Christine's Onstage Abduction

During the performance, Christine sings the invocation to the angels, and the stage suddenly goes dark. When the lights come back, she has vanished. The audience is in an uproar, and the managers are called. Raoul, who was in the audience, rushes to the stage, but Christine is nowhere to be found. The commissary of police, M. Mifroid, is summoned to investigate.