Five attractive girls find themselves trapped in an unfamiliar place with a strange voice telling them that one of them has to sacrifice her life in a diabolical ritual. Struggling to survive, the girls need to reveal their sins and sexual experiences in order to satisfy the devilish voice.

泰国北部，考古学家们在进行文物考察时无意中在一个山洞发现了一个木盒，在返回营地的途中，他们不小心把木盒掉入了山谷。回到营地后，考古学家们一个个接连死亡，每个人身上都有令人惊恐的似乎是被蜥蜴咬伤的伤口。与此同时，在清迈，泰国著名女作家关正在宣传她的新书，闲暇之余她从当地人手里买了一个自己很喜欢的木盒。但从此她身边便开始出…