A luxurious cruise ship "Argo" sails on the vast ocean. In addition to the noble ladies and wealthy people, there are also precious cargoes of inestimable value. However, behind this glamorous life on the sea, there is an evil conspiracy hidden. A group of vicious and evil people are commissioned to loot the cruise ship. However, a mysterious sea monster with a terrifying appearance attacked the cruise ship one step ahead, and the magnificent decoration was drowned in blood in an instant. The late robbers showed a tragic scene of hell on earth. The survivors Cui Lian (Famke Janssen) and Simon (Anthony Heald) told them what happened. The current situation is that the Argo is isolated and helpless, and there are bloodthirsty monsters lurking in the darkness. The originally hostile parties can only join hands and fight together to find a way to escape.