Seven strangers find themselves trapped in an underground storage facility, struggling to survive while being hunted by a supernatural beast that resides inside the mysterious 13th unit.Seven strangers find themselves trapped in an underground storage facility, struggling to survive while being hunted by a supernatural beast that resides inside the mysterious 13th unit.Seven strangers find themselves trapped in an underground storage facility, struggling to survive while being hunted by a supernatural beast that resides inside the mysterious 13th unit.