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Fingers (George Cole) and his gang of incompetent crooks try to rob the rich Bill Gordon (Terry-Thomas), but they come up empty-handed. Undeterred by the failure, Fingers plots to kidnap Gordon's daughter and hold her for ransom. But they can't even get that right, and instead they abduct Gordon's wife, Lucy (Brenda De Banzie), by mistake. Shockingly enough, Gordon is happy to be rid of his spouse, and ignores the ransom demands, so Lucy works with the gang to plot revenge. Wikipedia