Dimwitted Nobby (Sacha Baron Cohen) lives in an English fishing town with his loving girlfriend (Rebel Wilson) and nine children. For the last 28 years, he's been searching for his long-lost brother Sebastian (Mark Strong). When the two finally reunite, Nobby finds out that his sibling is a top MI6 assassin who's just uncovered a sinister plot. Wrongfully accused and on the run, Sebastian now realizes that he needs Nobby's help to save the world and prove his innocence.