Jim Owens goes back to his hometown to attend his high school class reunion to see family and friends. The fact that Jim is still leading the single life and all of his friends have settled down and married poses a big problem. He convinces his friends to go on one last escapade together and get revenge on their old high school adversaries. After almost breaking up a wedding and wreaking general havoc, Jim's friends and the townspeople have had enough of Jim's antics. Jim also has a chance to rekindle an old romance with a past love. Jim must find a way to mature past his high school days and become an actual adult.