Transsexual murders being investigated by the man who committed thema police detective.
A respected police commissioner has a reputation as a fervent opera lover, but by night he also enjoys plunging into the transvestite scene. In addition, he harbors a longing for his very own sister. When he learns that his wife has been murdered, he tries to implicate the set-designer who has designs on his sister.—Hannelore Goossens