When Stanley Stupid and his spirited wife Joan wake up to find their garbage stolen right out of the can--again--Stanley vows not to take it anymore! Is nothing sacred? But oh what a tangled web we weave when we are a Stupid. In his effort to get to the bottom of this heinous crime, Stanley lays a cunning trap to lure back the thieves. As expected, they take the bait, and he follows their getaway truck to the dump where he inadvertently stumbles on a covert weapons deal led by a couple of military men gone bad. Completely oblivious to what the Colonel and his sidekick are up to, Stanley believes there is a more sinister element at work here--that a diabolical figure from his past is behind the theft of all that fine garbage people have worked so hard to create. When the Stupids set-out to track down the criminal, they unravel an even greater conspiriacy involving aliens, the food service industry, international terrorists, a local newspaper, the police and, the post office.