An inept gang of bank robbers led by George The Brain is caught and sentenced to 15 years hard labour each. When they are released from prison they start out to collect the money they had stolen, which George had hidden in a hollow tree during the chase in which they were caught. The only trouble is that the tree was in the middle of a lonely lane when they were imprisoned; now, 15 years later, it's in the backyard of a police station.