At first it seemed like a series of accidents plagued Vienna's Court Opera. But after a singer is killed during rehearsals, evidence suggests something more dangerous. Someone is trying to murder famed conductor and composer Gustav Mahler. Worse, Mahler might not be the first musical genius targeted by this unknown killer. Alma Schindler, one of Mahler's many would-be mistresses, asks lawyer and aspiring private investigator Karl Werthen for help.