When legendary German conductor Helmut Wellauer is found dead in his dressing room two acts into a performance of La Traviata , police commissario Guido Brunetti is called in. Among those who might have provided the cyanide poison that killed the maestro, immediate suspects include the vaunted conductor's coolly indifferent young wife and those many in the music industry who are offended by his homophobia. Methodically probing into the victim's past, Brunetti also uncovers Wellauer's Nazi sympathies and a lead to a trio of singing sisters from yesteryear--one now destitute, one dead and the other missing. Though burdened by a dictatorial superior and two lumpen subordinates, Brunetti gets help from his aristocratic wife and her well-connected parents.