Christine's first lines in the song have the same melody as the song she and Raoul used to sing- "No, what I love best, Lotte said, is when I'm asleep in my bed, and the Angel of Music sings songs in my head... the Angel of Music sings songs in my head..."
She falls under the spell of desires old and new, and she forgets that her betrothed is watching, that there are gendarmes at every entrance, ready to fire. All that matters is her and her Phantom, drawing every closer together in the web of music that irresistibly binds them both.
And that song. The steady underbeats are so similar to that song from a time when she was still innocent as a rose: "Little Lotte thought, am I fonder of dolls or of goblins... of dolls or of goblins?"
She cannot answer that question.
Not until the music ceases and she is left facing him does she remember, too, the dark stories of the North.
She sees them embodied before her.
She rips off the mask, eyes gleaming with desperate triumph, mirrors of his.
