Its war time London and the Crazy Gang Flanagan amp Allen Nervo amp Knox Naughton amp Gold are doing their bit for the war effort by running a fish and chip stall using their platoons barrage balloon for advertising Their Sgt Major is not happy about this and orders them to take the balloon down but a freak heavy wind accidentally carries the gang away to Nazi Germany They are captured and placed in a detention camp where they meet an elderly prisoner named Jerry who possess a map for the location of a secret weapon which will win the war Fortunately Teddy Knoxs impersonation of Hitler lands him the spot of pretending to be the Fuhrer at a gala dinner and the gang are allowed out of the camp However the Nazis have other ideas for their substitute leader