Ambulance driver Frank Jessup is ensnared in the schemes of the sensuous but dangerous Diane Tremayne.

When Mrs. Tremayne is mysteriously poisoned with gas, ambulance driver Frank Jessup meets her refined but sensuous stepdaughter Diane, who quickly pursues and infatuates him. Under Diane's seductive influence, Frank is soon the Tremayne chauffeur; but he begins to suspect danger under her surface sweetness. When he shows signs of pulling away, Diane schemes to get him in so deep he'll never get out.—Rod Crawford <puffinus@u.washington.edu>

In California, the ambulance driver Frank Jessup and his partner head to a mansion in Beverly Hills to assist the millionaire Mrs. Catherine Tremayne that was poisoned with gas, but her doctor had already medicated her. When Frank is leaving the house, he meets Catherine's twenty year-old stepdaughter Diane Tremayne that follows him in her Jaguar. After-hours, they go to a restaurant and Frank finds an excuse to his girlfriend Mary Wilton to not visit her and he dates Diane and they go to a night-club. Diane has a crush on Frank and on the next morning, she meets Mary and tells to her what Frank and she did. Frank and Mary are saving money to open a garage since he is an efficient mechanic. Diane convinces Frank to be better paid working as a chauffeur for her family. Soon Frank learns that Diane hates her stepmother and he decides to quit his job. But Diane seduces him and he stay with the Tremayne family. When Mr. and Mrs. Tremayne have a fatal car accident, Diane and Frank become the prime suspect of the police and they go to court charged of murder. Now their only chance is the strategy of the efficient defense attorney Fred Barrett.—Claudio Carvalho, Rio de Janeiro, Brazil