AllMovie

Keith Michell returns in the role of Dennis Stanton, an ex-jewel thief turned insurance investigator. Jessica (Angela Lansbury) links up with her old friend Dennis when she arrives in San Francisco to attend the opening of a prestigious opera. Before long, things become "operatic" for real when a celebrated tenor, who had previously shot another man (in self-defense, he claimed) who'd been making overtures to the tenor's pretty protégée, succumbs to a suspicious heart attack.