Sonny, a lazy law school graduate, decides to take care of Julian, a five-year-old boy, to win his girlfriend back. However, things take a turn when the two start to genuinely bond.
Thirty-two-year-old Sonny Koufax (Adam Sandler) has spent his whole life avoiding responsibility. But when his girlfriend dumps him for an older man, he's got to find a way to prove he's ready to grow up. In a desperate last-ditch effort, Sonny adopts 5-year-old Julian (Dylan Sprouse), (Cole Sprouse) to impress her. She's not impressed ... and he can't return the kid.