Susie Bannion is a young American ballerina who travels to Berlin to study dancing at Madame Blanc's Markos Tanz Company, one of the world's most renowned schools. On her first day, one of the students who had been recently expelled from the school is murdered. As this appalling happening does not seem to be an isolated occurrence, the brilliant new student soon begins to suspect that the school might be involved in the homicide. Her mistrust heightens when Sarah, one of the girls at the school, tells her that before she was killed, Pat confided to her that she knew and guarded a terrifying secret.