A small time diamond merchant jumps at the chance to supervise the purchase and cutting of a large first class diamond. But when the diamond is stolen from him, he is blackmailed into pulling off a major heist at the Diamond Exchange, located at .

Starring:

Charles Grodin, Candice Bergen, James Mason, Trevor Howard, John Gielgud, Helen Cherry, Peter Vaughan, Cyril Shaps, Leon Greene, Jack Watson, Jack Watling, Clive Morton, Larry Cross, Glynn Edwards, John Bindon

Genre:

Comedy, Crime, Thriller