The film is adapted from the novel by John le Carré, the author of Tinker, Tailor, Soldier, Spy. The story takes place in contemporary Hamburg, Germany. A mysterious man comes to the local Muslim community for help. This man is half Chechen and half Russian, and is seriously injured. He comes here to recover his father's huge illegal gains. Everyone around him is skeptical about his identity. Is he a victim or a thief, or worse, has extremely terrorist purposes? Also involved in this matter are a British banker and a young female lawyer. At the same time, a seasoned German spy is also watching them all the time, trying to unravel what the mysterious man is up to.