Well in a fantasy story, I have an idea were there is a problem where a girl is born into a royal family. She's has a secret power that can bring the world to its jugement day and her father's foe is trying to obtain this power so he sends in his son to capture this girl. She goes on this journey after being exile from her home to keep her safe. While she is in exile she tries to harvest this power and learn from it.

That's how far on an idea I got