It’s Cook’s (Jack O’Connell) 17th birthday, and half the college have been invited to his uncle’s pub to witness a night Cook believes will go down in history. The girls get are about to leave when Freddie (Luke Pasqualino) gets a phone call from his sister Karen (Klariza Clayton). She’s at her best friend Kayleigh’s (Amy Burnett) engagement party and they want to get the party started. The gang head off uninvited. Cook attracts the attention of Kayleigh’s dad, notorious local gangster Johnny White (Mackenzie Crook). The party is a timid affair, so - ignoring Freddie’s warnings about Johnny White - Cook decides to do as the Cookie monster does and up the tempo, and the evening takes a turn for the worst.