In the late 1970s, Cockney crime boss Harold Shand, a gangster trying to become a legitimate property mogul, has big plans to get the American Mafia to bankroll his transformation of a derelict area of London into the possible venue for a future Olympic Games. However, a series of bombings targets his empire on the very weekend the Americans are in town. Shand is convinced there is a traitor in his organization, and sets out to eliminate the rat in typically ruthless fashion.

During WWII, the United States set up army bases in Great Britain as part of the war effort. Against their proper sensibilities, many of the Brits don’t much like the brash Yanks, especially when it comes to the G.I.s making advances on the lonely British girls. One relationship that develops is between married John, an Army Captain, and the aristocratic Helen, whose naval husband is away at war. Helen loves her husband, but Helen and John are looking for some comfort during the difficult times.