In London, a wealthy playboy, an American adventurer, a small-time thief and a retired safe-cracker team-up to rob a foreign embassy's safe by digging a tunnel from the London Underground into the embassy's cellar.

A Playboy tries to recruit a gang, who include an American who needs cash to satisfy his wife's expensive tastes, and an old time expert cracksman, to rob a foreign embassy's safe, but trouble starts when the plan begins to go wrong.—<[email protected]>