Discharged by his employer, a private eye stays on a jewel theft case after a model with information for him is murdered.

Tom Conwayas Tom Conway, Private Investigator
Mila Parélyas Helen Pascall
Naomi Chanceas Gina, a model
Eric Pohlmannas Mr. Mercedes
Andrew Osbornas Capt. Colin Simpson
Richard Wattisas Detective Inspector MacLeod
Margaret Halstanas Lady Marchant
Eileen Wayas Mme. Fernande
Michael Ripperas Eddie
Betty Cooperas Miss Betty, Showroom Mistress