Three armed robbers, Harry Rawlins, Terry Miller and Joe Pirelli, die when the security van that they are robbing catches fire in the Kingsway Tunnel in London. Their widows, Dolly Rawlins, Shirley Miller and Linda Pirelli, find their husbands' plans for the robbery and decide to stage it themselves. They enlist the help of a fourth woman, Bella O'Reilly and succeed in making off with the cash. Then Dolly learns that her husband didn't die in the robbery.