London nightclub buddies Salt and Pepper link Pepper's dead twin to diamond smugglers.

A famous jazz trumpeter finds himself unable to cope with the problems of everyday life.

After discovering the body of a murdered female agent in their trendy Soho, London nightclub, groovy owners Charles Salt and Christopher Pepper partake in a fumbling investigation and uncover an evil plot to overthrow the government. Can our cool, yet inept duo stop the bad guys in time?