Five high school students are having Saturday detention in a former Correctional Facility, and must find a way to outsmart an unseen menace out to kill them.Five high school students are having Saturday detention in a former Correctional Facility, and must find a way to outsmart an unseen menace out to kill them.Five high school students are having Saturday detention in a former Correctional Facility, and must find a way to outsmart an unseen menace out to kill them.