Brad, Steve, Hue, and Marvin are four get-nowhere boys who are forced into summer school, ending up at Cockswell Academy under the supervision of Principal Arsenault. The boys play a game where they earn points for every girl with which they score. On misadventures of their own, they decide to go for the ultimate 100-point score, Mona Lott, the new French teacher. But when they're unable to get a shot at her, they end up in the unforgiving clutches of the principal. After all is lost, they take one final chance during the school's anniversary celebration.

It was a normal night in Las Vegas, Nevada, all the lights were flashing brightly, until a man with one hand, one eye, and one leg walks into a pawn shop with a statue of a hideous looking Leprechaun. The owner claims it's a good luck charm. The statue also wore a medallion around it's neck. The careless pawn shop owner took off the medallion setting the Leprechaun free, along with his pot of gold that everyone wants and like before, he'll kill anyone who goes near it. Driving into town that night was a young man named Scott who was off to L.A. to go to school. Along the way he meets a sarcastic, but friendly, girl named Tammy. Scott tries gambling but loses everything, so he goes to the pawn shop to pawn his Rolex watch. At the shop, he finds the dead owner and one of Leprechaun's gold coins that grants a wish to its finder. Scott wishes for a winning streak, but what he does not know is that the casino is run by a crooked man who hates to lose...