Joe Dirt is a janitor with a mullet hairdo, acid-washed jeans and a dream to find the parents that he lost at the Grand Canyon when he was a belligerent, trailer park-raised eight-year-old. Now, blasting Van Halen in his jacked-up economy car, the irrepressibly optimistic Joe hits the road alone in search of his folks.

A black ops unit goes to middle east after a terrorist. They are betrayed and their operative is caught. Later, unit leader starts an investigation. Meanwile the enemy offers the operative a chance for revenge against his superiors.

A renegade general plots to bomb Washington using a new top secret jet called the Storm Catcher. The only trouble is only one man is capable of flying it. So they seek to put him on the run in a conspiracy that makes him appear to have murdered several men and stolen the plane. Then try to murder his wife and take his daughter prisoner. Threatening to kill his daughter if he doesn't help, he appears trapped. However, his best friend who is the plane's computer specialist has a few tricks up his sleeve.

Jokes fly as the Tune Squad takes on the Nerdlucks in a hardcourt game to decide if the Looney Tunes remain here... or become attractions at a far-off galactic off-ramp called Moron Mountain. The Nerdlucks have a monstrous secret weapon: they've stolen the skills of top NBA stars like Charles Barkley and Patrick Ewing and become Monstars. But that's not all, folks. The Tune Squad’s secret weapon just happens to be the finest player in this or any other universe. He's outta this world. So's the fun.