"Hello? Hello? Are you still there?" A girl's voice asked as lights turn on over Sherlock, who was sprawled face first on top of a table.

Groaning, Sherlock pushes himself up on to his arms, putting one hand to the side of his head. "Yes. Yeah; no, I'm-I'm still here. I'm here." He replied, weakly. He looks around and sees that he is in a small rectangular room with black walls and floor. He also noticed that someone put his belstaff coat on him.

"You went away. You said you'd help me and you went away." The girl said, tearfully.

"Yes, I know. Well, I'm sorry about that. We-we-we must have got cut off. Um...." replied Sherlock as he turns onto one elbow and shakes his head. "How-how-how long was I away?" He asked her.

"Hours. Hours and hours. Why don't grown-ups tell the truth?" She asked him.

"No, I-I-I am telling the truth. You can trust me." said Sherlock.

"Where did you go?" She asked him.

Sherlock looks up and sees a large metal grill in the ceiling and the night sky above. Although the sky is mostly cloudy, part of it is clear and shows a full moon. He slides his legs around to the side of the table and said. "I'm not completely sure." He sits on the edge of three table and looks around the walls, then slowly stands up. "Um, now, I tell you what. You-you've got to be really, really brave for me." He said as he leans down and picks up a nearby lantern from the floor. "Can you go to the front of the plane? Can you do that?" He asked her, walking across one of the walls; holding up the lantern.

"The front?" She asked.

"Yes." Sherlock replied.

The light from the lantern showed that many pictures have been stuck on the walls.

All of the nearby ones are large photographs of Sherlock when he was a child. "That's right; the front." He said.

"You mean where the driver is?" She asked.

"Yes, that's it." He replied as he keeps looking at the pictures. "Are you there yet?" He asked the girl but the response he got was not from the girl.

"Yeah, I'm here." John replied as he stands up abruptly and realized that he was sitting in water.

"John!" Sherlock exclaims.

"Yeah." John said.

"Where are you?" Sherlock asked.

"I don't know. I've just woken up. Where are you?" John asked as he looks around him.

"I'm in another cell. I just spoke to the girl on the plane again. We've been out for hours." Sherlock replied.

"What, she's still up there? John asked.

"Yes. The plane will keep flying until it runs out of fuel." Sherlock replied as John raises his head to look upwards. "Is (y/n) or Mycroft with you?" Sherlock asked.

"I have no idea. I can hardly see anything. (Y/N)? Mycroft?" John shouts.

Sherlock runs his hand over his face, looking worried. His heart beated rapidly when there was no reply until...

He heard someone groan. Sherlock gasped as John looks around and sees you just a few feet away from him. "(Y/N)? (Y/N), can you hear me?" John asked as you blink and shake your head.

"Ugh....John?" You said, groggy.

"(Y/N)!" You hear Sherlock say in your earpiece.

"Sherlock? Where are you? Where are we?" You asked, frantically.

"We don't know. Sherlock is in another cell." John replied.

"Are you okay, love?" Sherlock asked you.

"I'm fine." You replied.

"Good. John, are you okay?" Sherlock asked him.

"Yeah." John replied.

"All right. Well, you two keep exploring. Tell me anything you can about where you two are." Sherlock said as he continues walking around the time and looking at photos while you, after standing up, and John squint through the darkness.

"The walls are....rough. They're rock, I guess." John said as he puts his hand on the wall.

"What are you two standing on?" Sherlock asked.

You look down and said. "Uh, stone, I think. But listen: there's about two feet of water." John tires to lift one of his feet, but feels resistance. You do the same too and look down and shake your head when you couldn't move your foot either.

"Chains." You said as you look over at John.

"Yeah, our feet are chained up." John said.

"Wait....I can feel something." You said as you bend down and move your hand blindly through the water until your fingers touched something.

Clasping your hand around it, you straighten up and run your fingers over it. "Bones, Sherlock." You said. "There are bones in here." John said as Sherlock sees something under the table and turns to look at it.

He kneels down, puts the lantern onto the floor and reached towards the round ceramic bowl under the table. "What kind of bones?" He asked. You hand the bones to John who takes it and looks it over. "Uh, I dunno. S-small." He replied as Sherlock lifts the bowl and holds it in both hands and looks at it in shock. Painted on the side of the bowl is the word Redbeard. "Redbeard." Sherlock said, softly, and he closes his eyes.

"Who's Redbeard?" The girl asked. Sherlock jolts, sinking his face onto one hand and said. "Oh, hello. Are you at the front of the plane now?"  

"Yeah. I still can't wake the driver up." the girl said.

"That's all right. What can you see now?" He asked as he wipes the corner of his eyes.

"I can see a river. And there's-there's-there's a big wheel." She exclaims.

"All right. Well, you and I are going to have to drive this plane together. Just you and me." Sherlock said.

"We are?" She asked.

"Yeah, there's nothing to it. We just need to get in touch with some people on the ground." He said, trying to sound confident, as he bends down to pick up the lantern.

"Now, um, can you see anything that looks like a radio?" He asked her.

"No." The girl replied.

"That's all right. Well, we....keep looking. We've got plenty of time." He said.

Suddenly, the girl screams. "What's wrong?" He asked.

"The whole plane's shaking." She said, terrified.

"It's just turbulence. It's nothing to worry about." He said, soothingly.

"My ears hurt." The girl said.

"Does the river look like it's getting closer?" He asked her.

"A-a little bit." She replied.

"All right, then. That means you're nearly home." Sherlock replied as he puts his hand to his head.

"Sherlock?" John said as you and him look up and see moonlight shining down on the two of you. "We're in a well. That's where we are; we're in a bottom of a well." You said, in a slight panicky voice.

Sherlock turns and frowns at this. "Why would there be a well in Sherrinford?" He asked. He raises the lantern and looks closely at the array of photos on the wall in front of him. "Why is there a draught?" He asked himself as he notices a small gap between two walls and a photo of him as a teenager stuck across the gap, fluttering slightly. "Walls don't contract after you've painted them. Not real ones." He said as he lifts his eyes and places the lantern back down on the floor. He raises both of his hands and slams them hard against the wall, which falls outwards and drops to the ground. In front of him is a burnt out house but he recognized this place from anywhere. "I'm home. Musgrave Hall." He mutters.

"Me and Jim Moriarty, we got on like a house on fire which reminded me of home." Eurus said over his earpiece, as he starts to walk towards the house.

"Yeah, it's just an old building. I don't care. The plane; tell me about the plane NOW!" He shouted.

"Sweet Jim. He was never very interested in being alive, especially if he could make more trouble being dead." Eurus said.

"Yeah, still not intetested. The plane!" Sherlock replied. "You knew he'd take his revenge. His revenge apparently is me." said Eurus as Sherlock reaches the front door, opens it and enters.

"Eurus, let me speak to the little girl on the plane and I'll play any game you like." He said.

"First find Redbeard." She said, precisely.

Beside the stairs in the hallway, a screen is standing on top of a bureau which is covered in a sheet. The image of water pouring down, on the screen, now is replaced by Eurus's face.

"I'm letting the water in now. You don't want me to drown more of your pets, do you? At long last, Sherlock Holmes, it's time to solve the Musgrave ritual." She said. Sherlock stumbles back from the screen as Eurus continues. "Your very first case! And the final problem. Oh. Bye-bye." 

In the well, water is pouring on top of you and John. "Sherlock?" You said as you and the boys hear Eurus singing:

I that am lost

Oh, who will find me

Deep down below

The old beech tree?

Help succour me now

The East Wind blow

​​​​​​"Sherlock!" You and John shouted as Sherlock walks across the hall and opens a door to a room.

Once he enters the room, he stares at another screen on a wall but this one shows the water pouring down on you and John. "(Y/N). John." He said but you two don't the respond.
"(Y/N)! John! Can you hear me?" He shouts as Eurus continues to sing:

Sixteen by six, brother, and under we go

Be not afraid...
​​​​​​

"Help me! Help me, please!" The girl begs as at the same time you and John shouted. "Sherlock!"

"(Y/N). John." He said.

"Yeah, it's flooding." John replies.

"The well is flooding, love." You shouted.

"Try as long as possible not to drown." Sherlock said.

"What?" You two asked.

"I'm going to find you. I am finding you!" Sherlock shouted.

"Well, hurry up, please, because we don't have long!" John shouts as the little girl screams again.

"It's leaning over, the whole plane!" She shouts.

Sherlock glances behind him to the door, then turns towards the screen against and claps his hand over his mouth. 

In the well, you and John turn and try to get a handhold on the rocks lining the walls in an attempt to hold yourselves above the rising water. You lift your left leg as high as it will go to try to climb up the wall but the chain tugs at your foot and you fall backwards into the water.

You let out a loud cry as John tries to climb too but his fingers slip and he falls back down as well.

Back at the house, Sherlock turns and runs out into the hall as his sister continues to sing. "Eurus, you said the answer's in the song but I went through the song line by line all those years ago and I found nothing. I couldn't find anything. And there-there was a beech tree in the grounds and I dug. I dug and dug and dug. Sixteen feet by six; sixteen yards; sixteen meters--and I found nothing. No-one." He said.

"Sherlock?" You said.

"It was a clever puzzle, wasn't it? So why couldn't you work it out, Sherlock?" Eurus asked him.

"Sherlock? There's something you need to know." John said as Sherlock covers his mouth with both of his hands and lowers them, breathing heavily.

"Emotional context. And he-e-e-e-re it comes." Eurus said.

"Sherlock? The bones I found." You said as Sherlock walks back into the nearby room to look at the other screen.

"Yes? They're dog bones. That's Redbeard." He replied.

"Sweetheart....Mycroft's been lying to you; to all three of us." You said. Sherlock frowns in confusion as John says. "They're not dogs' bones."  

"Remember Daddy's allergy? What was he allergic to? What would he never let you have all those times you begged? Well, he'd never let you have a dog. What a funny little memory, Sherlock. You were so upset.....so you told yourself a better story. But we never had a dog." Eurus said, emphasising the last words.

Sherlock stands there in shock as it all comes back to him now. Redbeard wasn't a dog....but a person, a child.....his friend.

"Victor." Sherlock whispers while in the well you lift up a small human skull in both of your hands and stare at it in horror.

"Now it's coming." Eurus said.

"Victor Trevor." Sherlock said, in a soft shaking voice. He frowns as the memories come flooding back to him all at once. "We played pirates. I was Yellowbeard and he was.....he was Redbeard." He said, tears filling up his eyes as he looks back at his sister.

"You were inseparable. But I wanted to play too." Eurus said. Sherlock looks away as he begins to realize what started her behavior.

"Oh. Oh God." He said as he lowers his head and closed his eyes and cries softly. "What....what did you do?" He asked her but she continues to sing her song. Sherlock gazes downwards in grief as he remembers the day when he went looking for Victor when he went missing. "Victor." He said in a whisper again.

"Deep waters, Sherlock, all your life. In all your dreams. Deep waters." Eurus said, softly.

"You killed him." He said, devastated. He lifts up his head and said. "You killed my best friend."  

"I never had a best friend. I had no-one." Eurus said with quite anger.

Sherlock raises his head towards the ceiling as, back at the well, the water is now to yours and John's chest and the both of you struggle to keep your footing as more water pours down. Sherlock gazes upwards, his face anguished then he closes his eyes as he hears Eurus's voice say. "Come play with me, Sherlock! Play with me!"

He bites his lips and raises his head, looking towards the screen with determination. "Okay. Okay, let's play." He said, strongly, as he turns around and picks up the lantern from the floor and runs outside.

He hurries along the side of the house through an open gate a ditto the graveyard at rhetoric back of the house. As he runs around, bending  down and shining the light closely into various gravestones the little girl said. "Hello? Are you there?"  

"Need your help. I'm trying to solve a puzzle." He replied.

"But what about the plane?" She asked.

"Well, the puzzle will save the plane." He said as he looks through the inscriptions on the graves.

"The wrong dates. She used the wrong dates on the gravestones as the key to the cipher....and the cipher was the song." Sherlock said.

"Is this strictly relevant?" You shouted above the noise of rising water.

"Yes, it is. I'll be with you in a minute." Sherlock said as he focuses on the dates.

"The lights are getting closer." The girl said.

"Hush, now. Working." Sherlock said, gesturing dismissively. In his minds eye the words of the song appear before him. "Let's number the words of the song. Then rearrange the number words to match the sequence on the gravestones." He said and he does just that and starts swiping each word out of thin air in the correct way. 

"I...am...lost...help....me...brother...save....my....life...before....my....doom. I....am....lost...without....your....love.....save....my.....soul....seek.....my.....room." He said to himself and he stops dead on the last word. "Oh God." He whispered and he grabs the lantern and races back toward the house.

"We're going to crash! I'm going to die!" The girl screamed while, at the well, you and John try to tug at each of your chains off but to no avail.

Sherlock races through the gateway beside the house, runs around the side to the front and then bursts through the front door, then runs up the stairs. "I think it's time you told me your real name." He said to the girl.

"I'm not allowed to tell my name to strangers." She replied.

Sherlock reaches a closed door on the landing and stops in front of it. "But I'm not a stranger, am I?" He asked her, quietly.

He opens the door and stares intensely at Eurus, who is sitting on the floor of a burnt out bedroom; her knees drawn up in front of her and her hands wrapped around them, her eyes closed. "I'm you're brother." He said and he lowers the lantern to the floor and holds out his other hand towards her.

"I'm here, Eurus." He said, reassuringly.

"You're playing with me, Sherlock. We're playing the game." She said in a child like voice.

"The game, yes. I get it now. The song was never a set of directions." Sherlock said as he steps closer to her.

"I'm in the plane, and I'm going to crash. And you're going to save me." She said, still in a child like voice, as Sherlock crouches down in front of her.

"Look how brilliant you are. Your mind has created the perfect metaphor. You're high above us, all alone in the sky, and you understand everything except how to land. Now, I'm just an idiot, but I'm on the ground. I can bring you home." He said.

"No, no, no. It's too late now." Eurus said, her voice back to sounding like an adult, and she cries, her eyes screwed tight and her face twisted with fear.

"Everytime I close my eyes, I'm on the plane. I'm lost, lost in the sky and....No-one can hear me." She said as Sherlock reaches out and gently puts his hand over hers.

"Open your eyes. I'm here. You're not lost anymore." Sherlock said to her, softly. He shifts even closer to her and reaches out to embrace her. She shuffles forward and wraps her arms around him and they hug each other while she cries.

"Now, you....you just....you just went the wrong way last time, that's all. This time, get it right." He said, tearfully, as he strokes her hair. "Tell me how to save my wife, who is carrying my child, and my friend." Sherlock said in a soft clear voice.

He pulls back and cradles his sisters head with one hand and gazes pleadingly into her eyes. "Eurus....help me save John Watson, (y/n) Holmes and my child."

In the well, you and John grimace and groan as the two of you tilt your chins up out of the water as you two strain with effort of trying to pull the chains free.
Then a light switches down onto the two of you from the top of the well and a rope is thrown down to you. Gasping with relief, you and John take a hold of it while you see someone climbing down to help you and him out.

After getting out of the well and getting some towels wrapped around you, you look around and see Sherlock, who sees you as well, and both of you rush towards each other and embrace one another.

"(Y/N)." He said, softly as he kissed the side of your head.

"I was so scared, Sherlock. I was afraid it was going to be too late." You whisperd, tearfully.

"It's okay. You're safe now." He said, kissing your neck.

You place your face in the crook of his neck as you felt tears pouring down your face.

After the two of you pull out of the embrace, John walks over to you as the three of you watch the officers take Eurus away from the house. Lestrade walks over to you and said to Sherlock.

"I just spoke to your brother."

"How is he?" Sherlock asked him.

"He's a bit shaken up, that's all. She didn't hurt him; she just locked him in her old cell." replied Lestrade.

"What goes around comes around." said John as you smile.

"Yeah. Give me a moment. (Y/N), can I speak to you for a moment?" Lestrade said.

You look over at Sherlock, who nods, and you start to follow him. "Oh, um. Mycroft--make sure he's looked after. He's not strong as he thinks he is." Sherlock said to Lestrade.

"Yeah, I'll take care of it." Lestrade said, nodding.

"Thanks, Greg." Sherlock said.

You, Lestrade and John look at each other for a moment then over at Sherlock in surprise, who has a small smile on his face, and you and Lestrade walk away.

"You all right?" He asked.

"Besides almost drowning....never better." You said with a smirk and Lestrade chuckles.

"Listen, is it true?" He asked.

"Is what true?" You asked him.

"That you're pregnant?" He asked.

You smile and nod at him as Lestrade looks at you in surprise. "Wow...um...God....I don't know what to say except...Shit, there's going to be another Holmes running around." He said and you bust out laughing.

An officer comes up to you and Lestrade and said. "Sir, the helicopter is ready."  

"Let's move her, then." Lestrade said. The officer nods in Sherlock's direction and asked. "Is that him? Sherlock Holmes?" You and Lestrade look over at your boys as Lestrade asked. "Fan, are you?"  

"Well, he's a great man, sir." The officer replied.

"No, he's better than that." You said as you stare at Sherlock, who felt your gaze and stares back at you.

You smile as you said. "He's a good one." Lestrade and the officer stare at the boys alittle longer until Lestrade turns to you.

"Well, if you need anything, (y/n). Let me know." He said.

"Thanks, Lestrade." You said and you walk back to your boys.

"You okay?" John asked Sherlock.  "I said I'd bring her home. I can't, can I?" Sherlock asked.

"Well, you gave her what she was looking for: context." You said as you walk up to his side.

"Is that good?" He asked you.

"It's not good, it's not bad. It's...." You trailed off as you search for the right words but John finishes it for you.
"It is what it is."

​​​​​​"Alive?! For all these years?" Mrs Holmes asked Mycroft. It was a few days after the events and you, Sherlock and his parents were in Mycroft's office.

Mycroft was sitting behind his desk while his father sits in a chair across from him and his mother stands at the other end of the desk staring in shock at her older son.

Sherlock is standing at the far end of the room, leaning against the closed door and you stood in front of him, his arms wrapped around your waist, his fingers gently stroking you belly, which had started to grow, and his head rested on your shoulder.

"How is that even possible?!" Mrs Holmes asked Mycroft.

"What Uncle Rudi began I thought it best to continue." Mycroft replied.

"I'm not asking how you did it, idiot boy, I'm asking how could you?" She asked, angrily.

"I was trying to be kind." replied Mycroft, raising his eyes to his mother.

"Kind?! Kind? You told us that our daughter was dead." said Mrs Holmes as she becomes tearful.

"Better that than tell you what she had become. I'm sorry." Mycroft replied.

"Whatever she became, whatever she is now, Mycroft....she remains our daughter." replied Mr Holmes.

"And my sister." Mycroft stated.

"Then you should have done better." said Mrs Holmes.

"He did his best." Sherlock replied, quietly.

"Then he's very limited." His mother said.

"Where is she?" Mr Holmes asked.

"Back in Sherrinford; secure, this time. People have died. Without a doubt she will kill again if she has the opportunity. There's no possibility she'll ever be able to leave." Mycroft replied.

"When can we see her?" His father asked.

"There's no point." said Mycroft.

"How dare you say that?" His mother said, upset.

"She won't talk. She won't communicate with anyone in anyway. She has passed beyond our view." Mycroft said to her, firmly.

"There are no words that can reach her now." He said.

Mrs Holmes turns to look at Sherlock and said. "Sherlock." He raises his head at her and she shrugs, questioningly, at him and said. "Well? You were always the grown-up. What do we do?"

You and Sherlock look at each other for a moment then he turns his head away lightly, looking thoughtful.