The Ninth Passenger (2018)

A group of hedonistic college students embarks on a wild party aboard a lavish yacht, seeking a weekend of debauchery. However, their celebration takes a sinister turn when they discover an unexpected ninth passenger among them. As the body count rises, paranoia escalates, leading to betrayal and suspicion. Tensions flare as friendships fracture, and the group must confront the chilling reality of their situation. With each passing moment, the once-thrilling getaway becomes a deadly game of survival, forcing them to face their darkest instincts.