In his head, 15-year-old Welsh schoolboy Oliver Tate is a cool literary genius. In reality, he’s socially inept and unpopular. Oliver has set himself two tasks for the summer: to lose his virginity and save his parents’ marriage. Suspecting his mother is having an affair, he begins to forge passionate love letters to her from his unsuspecting father. Meanwhile he attempts to seduce his schoolmate Jordana through a calculated bullying incident.