Four crooks (Johnny Mellors, Monty, Blackie and Bert) plan and execute a robbery on a payroll van, using the inside knowledge of Dennis Pearson, who works as an accountant at the firm concerned. Pearson is under pressure to support his wife Katie (Françoise Prévost (actress)), who demands a higher standard of living. However, the van driver, Harry Parker, is killed during the heist, while Bert is fatally wounded by Parker's colleague Frank Moore. Nevertheless, the gang manages to get away with £50,000.