Jazz musician Acker Bilk plays himself in this cinematic jam session of music, melodrama, and low comedy. The film's title is literal: the plot involves a jazz band comprised of ex-convicts. Once released, they supposedly go straight, taking their show on the road. Actually, their tour is a subterfuge to commit a series of robberies. Jimmy Thompson appears in Band of Thieves for comedy relief, while Jennifer Jayne hangs around for sex appeal.