Nobby (Sacha Baron Cohen) has everything you would want a man came from Grimsby – 9 children and a friend, whom he loves more than anything in the world. Life’s not only one thing missing: his young brother, Sebastian (Mark Strong), that has been separated since childhood. Once he has sought for 28 years after Nobby gave his brother in London – but has no idea that he’s an assassin in the service MI6. After a catastrophic goodbye, where Nobby unwittingly destroys Sebastian’s career, making him the brothers in intelligence targets, they get to foil the attempted destruction of the world. To save humanity and his brother Nobby must embark on a mission that will carry it around the world and it will turn a nice noodle in a sophisticated secret agent.