Jean Perkins is frantic because her husband, Henry, is late home for his birthday dinner with their good friends Betty and Vic. Who Henry eventually arrives home he's not interested in his birthday dinner or Betty and Vic, he wants to immigrate immediately, and with good reason. On his way home he accidentally picked up the wrong briefcase which just so happens to be stuffed with £735,000! When two police inspectors call, Henry, Vic, Betty and an ever increasingly tipsy Jean are forced into a frantic game of cat and mouse. Hilarious innuendo and cruelly funny turns of fate ensue as the two couples assume various identities in their battle to keep the money.