While out on a scuba diving trip in Africa, the motor on the group’s boat explodes, leaving them stranded in the middle of the ocean. They think they’ve been saved when they see what appears to be a merchant ship. About to ask for help, the group witnesses a terrible murder. Unsure what to do, the group secretly boards the ship with the idea that they’ll sneak off at the next port to get help. However, the ship’s crew has other ideas. They are prepared to do whatever it takes to get rid of any proof of the murder, and any witnesses...