A group of eight wealthy college friends, including the charismatic Brady (Jesse Metcalfe) and the sharp-witted Lex (Alexia Fast), charter a private yacht for an exclusive party cruise off the coast. Their celebration of youth and privilege takes a terrifying turn when a mysterious and violent stranger, played by Timothy V. Murphy, emerges from the shadows as the uninvited ninth passenger. Directed by Ian Pfaff, this tense thriller strands the privileged group in the middle of the open ocean, where their social dynamics fracture under the pressure of a deadly game. As paranoia escalates and loyalties are tested, the friends must confront not only the immediate threat but also the dark secrets within their own circle. The film masterfully builds a claustrophobic atmosphere of suspense, transforming a luxury vessel into a floating prison where every alliance is questionable and survival becomes the only goal.