Four victims of a stock swindle meet and plot to get their money back from the crooked financier responsible. Each man, an Oxford professor, a Harley Street physician, an art dealer and a British aristocrat deploy their individual talents in elaborate stings to get back "Not a Penny More, Not a Penny Less"

An American ex-con who is trying to go straight is persuaded to be the inside man for an audacious bank job in central London.