The gang from the popular pre-teen comedy gets together again to celebrate the wedding of long-time couple Kelly and Zack. They decide to tie the knot in Las Vegas, so with the girls in one vehicle and the guys in another they take off. Trouble comes when the boys take a desert short-cut and end up in a backwater jail for speeding. In order to get out, Zack must spend his wedding money. When they get to Vegas, they are flat broke and faced with a dilemma: how can Zack tell Kelly that he can't afford their wedding? In typical Saved by the Bell fashion, conniving Zack simply lies to her until he figures out a way to drum up some more cash. As usual his plan is a disaster and the gang ends up fleeing angry mobsters.