A wealthy American couple on a sightseeing tour of Athens draw a shady tour guide into a treacherous game of deception in this international thriller adapted from a novel by Patricia Highsmith. Athens, Greece: 1962. Charismatic Chester MacFarland (Viggo Mortensen) and his ravishing wife Colette (Kirsten Dunst) are soaking in the sights of the Acropolis when they cross paths with American-born tour guide Rydal (Oscar Isaac), whose instant charm and quick wit soon earn him an invitation to join the couple at dinner. A low-level con artist whose fluency in Greek helps him earn a healthy income on the side, Rydal fails to notice that his two new companions harbor some sinister secrets when he pays them a visit at their posh hotel, and stumbles upon Chester dragging an "unconscious" man down the hallway. Chester claims that he knocked the man out during a vicious attack, and after some convincing Rydal agrees to help him move the stranger out of the way. Meanwhile, his flirtations with Colette increasingly reciprocated by the sensitive beauty, Rydal's paranoia begins to mount as he realizes that he has become inexorably linked to the mysterious couple. But the real game has only just begin, and as Rydal searches desperately for a way out, the trio embark on a chase that takes them first to Turkey, and later to Istanbul's Grand Bazaar, where the crowded back alleys serve as the stage for one final, fateful confrontation.