A group of six close friends embark on what is supposed to be a fun, off-the-grid wilderness backpacking trip deep inside an isolated, dense forest reserve. The vacation turns into an absolute nightmare when they lose their map, their cell signals vanish, and they realize they are hopelessly lost in the woods. One by one, members of the group begin suffering 'accidental' injuries and turning up dead, spreading an atmosphere of intense paranoia and terror among the survivors. Realizing that the killer is not an external threat but someone within their own trusted circle, the remaining friends turn on each other in a primal fight for survival.