Duringanexclusivetour,apowerbreakdowninsideasecretprisonknownastheDeathHousesendstwoagentsfightingthroughalabyrinthofhorrorswhilebeingpursuedbyaruthlessarmyofroaminginmates.Astheyfighttoescape,theagentspushtowardthelowestdepthsofthefacilitywheretheylearnasupernaturalgroupofevilbeingsaretheironlychanceforsurvival.