As the summer sun shines down on England in the early 1980s, two boys who couldn't be more different are brought together by a mutual love of cinema and a desire to emulate their favorite action movie icon. Will Proudfoot (Bill Milner) is a well-mannered schoolboy being raised in an ultra-religious community that deplores such corruptive distractions as television and seeks to maintain its purity by severely limiting contact with the outside world. In order to exorcise his creative inner demons, Will has taken to sketching imaginative drawings and complex illustrations. Lee Carter (Will Poulter) is the school terror, a rampaging hellion whose overaggressive behavior has made him an endless source of frustration to the faculty, and a source of fear to his fellow classmates. As fate would have it, Will is in the school hallway avoiding exposure to the classroom television when a fed-up teacher ejects Lee from the classroom. Though at first it appears as if Lee is about to torment timid Will just as he does the rest of the student body, the two form a tight bond after Will convinces Lee to view a bootleg copy of Rambo: First Blood. When Lee informs Will that he wants to shoot a homebrewed version of the violent action film for an upcoming amateur filmmaking contest, a sudden streak of rebellion prompts his sheltered classmate to readily agree. As the summer wears on the two boys set out to create the ultimate no-budget action movie, but their grand vision hits an unexpected hitch when a busload of French exchange students arrive at the school and the leader of the pack attempts to hijack the production.