I am going to say right now I am not including the Percy Jackson except the gods occansionally. Maybe a time travel or modern scene.

Anya is a dancer with the Paris Opera house in the year 1993 over sixteen years after Christine left Erik. She came from a school for Demigods, Half Blood Univeristy. She has cut all ties with her fellow students but the gods still talk to her and protect her. She Knew about the lake the moment she stepped foot in the Opera House. She often went down there. One day she loses track of time and The Phantom finds her. What will happen next?