This film shares similarities with the work of John le Carré in its exploration of deception within the world of espionage. "George," portrayed by Michael Fassbender, and his wife, "Kathryn" (Cate Blanchett), maintain a surprisingly resilient marriage despite frequent secretive interactions—those conversations they can’t openly discuss—a situation that draws envy from their peers. The catalyst for suspicion arises during a dinner party held at their home, where George begins to suspect one of the guests is betraying them. He's been provided with the identities of everyone present, including his wife. This group proves to be a collection of aggressive, unfaithful, and manipulative individuals, presenting George with a significant challenge as he tries to identify the guilty party, especially when that person turns out to be someone very close. Simultaneously, while George is observing her, Kathryn works for their boss, "Stieglitz" (Pierce Brosnan), who is also engaged in his own clandestine activities. The narrative constantly poses questions: what are people’s true intentions? Who is manipulating whom? These secrets are gradually revealed over ninety minutes of skillfully executed spy work, featuring a cast anchored by Fassbender's performance and bolstered by Tom Burke’s distinctly unpleasant portrayal of "Freddie." There's an appealingly intricate level of scheming and counter-scheming, even some playful attempts to mislead. I initially worried it might resemble “Mr. & Mrs. Smith,” but this film is considerably darker and more captivating, avoiding prolonged action sequences and offering only a subtle sense of threat.

Source on TMDB