If Christine's father hadn't told her that there would be an angel to guide her and protect her in the future, she would have been intelligent enough to discover the phantom's real heart, which was lonely and gradually became violent and evil.
When the phantom sang songs to Christine in the mirror, she felt horrified and her sensitve instinct led her quickly escape. The phantom's broken heart was bleeding, motivating him to retaliate.
One silent night, the phantom's charming voice was winding around the opera house, the sound controlled Christine's soul, guiding her to walk down to the underneath lake. Raoul was alert to the unusual of the opera house, so he tracked the trail and reached the lake. Then, Raoul and the phantom competed with their voice, trying to take over Christine's soul.
In the end, Roaul's voice called back Christine's soul with great love, and the phantom fell into much deeper sorrow all by himself.
