Music producer and Creation Records co-founder Alan McGee (Ewen Bremner), blessed with a keen musical sense, entrepreneurial spirit, and a hard-partying lifestyle, played a pivotal role in the rise of 90s Britpop, launching the careers of era-defining bands like Oasis, Primal Scream, and My Bloody Valentine. By a poolside with a reporter (Suki Waterhouse), McGee recounts his life from childhood to the mid-90s, when he managed one of the coolest music scenes of the time while immersed in a drug-fueled haze. The film provides a comprehensive look at how a boy from a working-class Glasgow family became one of Britain's biggest and most influential music moguls.