Since they're lousy at making money farming, Bo and Luke take a side job delivering crash-up-derby cars to a local race promoter. The catch? He's cooked, and somehow the Dukes will be mistakenly blamed for whatever bad is about to happen. I know. It's mind blowing. Anyway, they figure out he's smuggling stolen racing engines out in old smashed up cars so they continue working with him until they can catch up with the goods. Bo has to demo derby the General against a "slammer" car. The bad guy wears an ascot like Fred on Scooby Doo. Hijinks ensue.