Earl Fenner is a bookkeeper who saw his boss murder a man.
There is a heavy price for his silence. Fenner demands $100,000.
The boss asks Fenner to rendezvous with him at Dante's nightclub in San Francisco.
Dante tangles with the dead man's brother who wants to find the murderer. Dante is not happy that his club has been used for dirty dealings.
Dante investigates and finds a female accomplice who is willing to poison him. Someone wants to silence Fenner for good.
A brisk episode where Dante nearly expires. There is even comedy as Dante tries to seduce a sophisticated French woman. She is not happy to come second best.