The Lark's Song (a Phantom of the Opera-based fanfic)

{ The Phantom of the Opera fanfic.
Based upon Gaston Leroux's original novel mostly. Perhaps a little of the 1925 movie or Andrew Lloyd-Weber musical. }
Through a drastic, emotion-bound error of Raoul's, Christine Daaé's child ends up in the hands of Erik while she remains heartbroken believing the child dead.
Christine's daughter has grown to fifteen years in the isolated tunnels and mazes of the Opera Populaire while operas and parties rage upstairs. Without any to find company in beside Erik, the Girys, or a man referred to as the Persian, she does something she knows none of her guardians would approve. Can her secret be kept?
While her daughter grows, Christine has a paranoid feeling that her child is everywhere. Once she accepts that her baby is gone, can she try to have a normal life with Raoul? Or will the Phantom always haunt her?