Average Joe's Gym and its owner, Peter La Fleur (Vince Vaughn), are both down on their luck. A fancy competing gym called GloboGym, run by the maniacal health nut White Goodman (Ben Stiller), is about to put Average Joe's out of business unless Peter can raise $50,000 to keep his mortgage. To save the gym, Peter and a ragtag group of Average Joe's members and employees enter a dodgeball contest with a big cash prize. In response, White forms his own GloboGym team to rout the competition.