超索模特兒情侶卡爾（哈里斯迪堅臣 飾）和雅雅（莎樂比甸 飾），受邀當KOL免費登上豪華郵輪。被貧窮限制想像的二人頓時眼界大開，被同船的超級富豪帶進了奢華的上流生活。正當眾人享受著由船長（活地夏里遜 飾）主持的豪華晚宴時，一場暴風雨突然襲來，一幕幕搞笑又荒誕的場面不斷上演。豪華郵輪之旅突變搭沉船，生還者被迫流落荒島。在斷水斷糧面前，原有的社會階級迎來翻天覆地的改變！草根階層的清潔工爬上了食物鏈的頂端，瘋狂的生存戰爭即將展開！回歸弱肉強食的原始世界，為了生存人性可以有幾荒誕？

A year after Sheila is killed in a hit-and-run, her multimillionaire husband invites a group of friends to spend a week on his yacht playing a scavenger hunt-style mystery game — but the game turns out to be all too real and all too deadly.

A group of salacious students party aboard a luxury yacht only to turn on each other as a 9th PASSENGER picks them off one by one.