Tensions simmer and nerves begin to fray as a family realize that untold evil is lurking beyond their walls, in this dread-inducing thrill ride from the executive producer of the Saw franchise. After Melissa and her family seek shelter from a storm, they become trapped. With no sign of rescue, hours turn to days and Melissa comes to realize that she and her girlfriend Amy might have something to do with the horrors that threaten to tear her family - and the entire world – apart.