A tour guide in Chinatown and his girlfriend get mixed up with jewel thieves and murder.

Two San Francisco brothers, Clark (Theodore von Eltz)and Victor Duryea ('Edward Emerson'), run a jewelry store in Chinatown that really serves as a fencing operation for stolen goods. Clark's wife, Myra (Polly Ann Young), becomes aware of their crooked operation and states her intentions to leave him. Clark, fearing that Myra will inform the police, kills her and stuffs her body in a truck. Meanwhile, Myra's sister, Gloria Watkins (Elaine Shepherd), comes to San Francisco to visit her sister, finds out she is missing, and sets out to investigate her disappearance. Along, the way, she is aided by "Puss" McGaffey ('Vince Barnett'), a Chinatown tour-bus driver and his friend Eddie Barton (Norman Foster), the tour-bus barker who aspires to be a private detective—Les Adams <[email protected]>