While visiting a health studio in Beverly Hills, fashion model Jennifer Downing, the daughter of millionaire P.J. Downing, is kidnapped. Her father turns to a family friend, Eliot Draisen, who is president of the detective agency Crumb & Crumb, to investigate the case. Also assigned to the case is Police Detective Casey, who (unlike Harry) is competent and experienced in kidnapping cases, and has a strongly negative opinion of private eyes and Harry Crumb is no exception. Casey throughout the course of the film builds a rivalry with Harry.