Steve Gordon, an American agent posing as a black market operator, is in Tangier on a mission to stop the plans of three atomic-scientists who are there to pool their secrets and sell them in a package to the Communists.

A woman reporter, a navy investigator, and a heavyset police detective come across a gang which scuttled a ship in order to loot her later, underwater, for a Navy money consignment.

Sach just lost his job as an assistant to a private detective, but he wasn't paid. Slip goes with him down to the detective's office to demand payment, but finds the office empty. A woman enters the office and mistakes Slip for the detective and convinces him to take on a case to find her sister after offering a $50 retainer.

In Casablanca, Morocco in December 1941, a cynical American expatriate meets a former lover, with unforeseen complications.