Dr. Nookey is disgraced and sent to a remote island hospital. He is given a secret slimming potion by a member of staff, Gladstone Screwer, and he flies back to England to fame and fortune. But others want to cash in on his good fortunes, and some just want him brought down a peg or two.

Involuntarily-retired Colonel Hyde recruits seven other dissatisfied ex-servicemen for a special project. Each of the men has a skeleton in the cupboard, is short of money, and is a service-trained expert in his field. The job is a bank robbery, and military discipline and planning are imposed by Hyde and second-in-command Race on the team, although civilian irritations do start getting in the way.