Story is quite similar to the show from Arnav leaving till his rescue. It was all Shyam's plan to trap him and he only made false crisis through his men. And tried to trap Khushi. But Khushi being brave and smart started searching Arnav.

It started when she received call from Arnav. As she was missing his terribly and they got news that he has not reached yet.
After talking with Anjali and Akash he talked with Khushi.
Arnav: Khushi... Khushi Stop crying. I am fine... (she goes at a distance)
Khushi: I can feel it. You're not fine.
Arnav: After talking to you, listening your voice I am fine. I'll be Back soon. Jaan.... Stop Crying now.
Khushi: I am missing you please come back soon.

Arnav:... Umm, please take care of my babies... will You?
Khushi: .... No, you have to come to take care of them.
Arnav: I am dying to be with my baby girl. Please be strong. Take Care of yourself and everyone.
The desperate voice and mention of babies gave Khushi idea that he is some problem, cause the night before leaving Arnav told him that he has 2 babies to look after and Khushi being crazy thought that he has 2 children.. but he explained that Khushi is ARD is his first child and second his crazy wife to which he loves the most ( his both babies and his all properties are under ARD ) she could guess he wants to save her and ARD if he is trouble. And only threat is Shyam. She started her investigation and also asked NK's help and it goes on till she finds Arnav safe and sound and brings him back home safely. She also falls from cliff and gets injured but here Shyam pushes her from cliff but Arnav couldn't see that. to save himself he fakes his accident and reaches home.
Soon Arnav and Khushi comes home in not so healthy condition. And Khushi disclose about Shyam kidnapped Arnav and They both start blaming each other.
Khushi: Shyamji you're one of the disgusting creature i have ever met. How could you stoop so low just for money? You kidnapped Arnavji and tried to harm him?
Shyam: Khushiji why are you saying like that? Why would I do so? Intact you are the one cheating him! When he was not here you always find chances to come close to me. Even you asked me to divorce RS.
Khushi: I..
Mamiji: Yes Khushi, Even I saw that, not only me but Anjali bitiya also saw that. You know how hurt she was?
Khushi: I just acted so that I can find Arnavji. Because he kidnapped him. I have to find Arnavji. I had no other option. And about cheating him I never did that. It was you who cheated Di. Yes I asked you to divorce Di cause she deserves a better life, without you , without a person who cheats her and loves her immensely.
Shyam: WHAT are you saying? Why would o cheat her? I love her so much. And now she is carrying my baby. For God sake, stop spoiling my relationship with RS.
Khushi: YOU! You're the one who stalked me from Lucknow to Delhi......
(She tells everyone about him, being to her paying guest to fiance and everything)
Shyam: Khushi, I thought you're a simple and nice girl but instead you're a character... SLAP!
Arnav: Dare you utter nonsense About my wife. Get Out!
Anjali: Chote...
Arnav: Di Khushi is right. I believe her.
Anjali: But I believe Shyamji. He can't do such thing.
Arnav: And can Khushi do that?
Payal: Di khushi is saying truth.. please believe her. Because of your and my happiness she was silent. But I can't see her suffering more because of me. Please...
Arnav: My decision is final. Guards take him out off this house.
They drag Shyam out Anjali tries but Arnav holds her. She leaves for her room.
Everyone follows but she close herself alone in room. They call her but she ignores them soon everyone leaves for their room. Nani asks all to give her some time and space.

Another update. Sorry for delay. Hope you like it.next update will be on Arshi and payash. Majority part will be on Arshi. Press ⭐ to vote. I know it isn't interesting but I'll try to cover up in next. Thank you
Love Akhyaa