Stu Bailey's agency is hired to go undercover at a dance hall after two hostesses are murdered by an unknown assailant.

A cat burglar who dons the costumes of films past confounds Stu.

Stu teams up with private detectives from Hawaii and French and English police to discover how a pair of criminals steal from their victims and leave them physical wrecks. Folk singers Peter, Paul & Mary perform.

The detectives' former secretary walks back in after six years, suffering from amnesia.