AllMovie

An awkward yet intelligent young boy begins to make his transition into adulthood over the course of one transformative summer in this bittersweet coming-of-age comedy-drama. Sensing that he's drifting away from his mother Pam during a summer vacation with her, her domineering boyfriend Trent, and Trent's daughter Steph, 14-year-old Duncan (Liam James) gets a job at a water park, and gains some much-needed self confidence under the guidance of happy-go-lucky park employee Owen, who approaches life from a fresh new perspective. Steve Carell, Toni Collette, Allison Janney, and Sam Rockwell co-star.