Mystery writer Janet Frobisher lives alone in a dark English country house, when she's not philandering with her secretary's fiancée. At an extremely awkward moment, she has an unwelcome visitor: George Bates, who claims to be the partner in crime of Janet's estranged husband. George insinuates himself into Janet's home and life despite her efforts to get rid of him; the tangled relationships develop into a macabre, murderous cat-and-mouse game.
Sam, journaliste indépendant, profite de sa culture musulmane pour infiltrer les milieux intégristes de la banlieue parisienne. Il se rapproche d’un groupe de quatre jeunes qui ont reçu pour mission de créer une cellule djihadiste et semer le chaos au cœur de Paris.