Shawn seems to have everything going for him. He's funny, well-liked, and is dating the girl of his dreams. But Shawn's world is turned upside down when his girlfriend, Claire, admits that she cheated on him with one of his own fraternity brothers. Looking for solace, Shawn visits his best friend, Phil, and together they realize that the only way to find out who slept with Claire is to look for him themselves. Shawn then goes on a search to find out who was it that betrayed his trust and slept with his girlfriend.