An archeological expedition into a lost Egyptian tomb to uncover a mystery turns for the worst when the exploration group becomes trapped inside. Their only way out is to move through the sacred tomb and find another exit point. However their presence disturbs an entity that has been trapped in the catacomb thousands of years before. Throughout their perilous journey they learn there was a reason why such a force had been imprisoned. The creators of the tomb could not destroy the evil and so resorted to trapping it instead, never to speak of or write it into history. With their supplies and sanity limited, it is clear the expedition has turned into survival.