When a security van heist goes disastrously wrong, three armed robbers are burnt to death - and three women are left widows. Then gang boss Harry Rawlin's wife, Dolly, discovers his bank deposit box. It contains a gun, money - and detailed plans for the failed hijack. Dolly has three options: she could hand over Harry's ledgers to Detective Inspector Resnick; she could pass them to the thugs who want to take over Harry's turj; or she and the other widows could finish the job their husband started... As they rehearse the raid unitl it's pitch perfect, the women realise that Harry's plan required four people, not three. But only three bodies were discovered in the carnage of the original hijack. So who was the fourth man, and where is he now?