Once upon a time, there was the King of Arendelle, King Agnarr and his Queen, Queen Iduna were expecting girls, twins to the whole kingdom of Arendelle. 

"This is so exciting, Agnarr. We're going to be finally be parents! It's hardly a dream come true." Iduna said, happily to her husband. 

The king smiles at his queen, as he nods at the sight of becoming not just the king of an kingdom, but to a father of twins. 

As the whole kingdom awaited for the twins arrival, someone came towards them . 

"Who you be?" King Agnarr demanded, as he protected his pregnant wife from the mysterious person who came before them. 

"Don't be alarmed. I'm just a mere fortuneteller. I came to tell the future." She said, as the parents were unsure of that they should trust her. 

The fortuneteller came forth towards the pregnant Queen as she touches her belly , as the foreteller's eyes widen with a curious expression.  

"How interesting . It's nothing like I had seen before." She exclaims as she walks away as the King demanded, "What did you see , what does our children behold?" 

She didn't reply back to the King as she knew something they don't. 

"Twins who born with powers. One with Fire, other with Ice." 

The King and queen were horrified. Neither wanted the sisters to be together when they're near each other. 

"Let's separate them, and hope they never meet. " King Agnarr declared. 

The queen concurs as that the sisters or the people never learn the deep secret of the powers.