A group of young Muslim men living in Sheffield decide to wage jihad, and they hatch an inept plan to become suicide bombers. Omar (Riz Ahmed) and Waj (Kayvan Novak) have a brief, disastrous run at a Pakistan training camp, while Faisal (Adeel Akhtar) works on an unlikely scheme to train birds to carry bombs. Their ill-conceived plan culminates at the London Marathon with their bumbling attempts to disrupt the event while dressed in outlandish costumes.