Mia, David, Olivia, Natalie and Eric are five friends in their 20s who decide to take a little vacation to a cabin in the woods. When they arrive at the cabin, they discover the Book of the Dead, a dangerous volume filled with occult secrets. As they peruse its pages, they accidentally release several demons from the nearby woods. Their peaceful trip soon turns into a nightmare as the demons turn their attention toward the young adults, possessing them and turning them against each other. Soon, they are caught up in a grisly contest for survival as they do unthinkable things to each other under the influence of these evil beings. Before long, only one of them will be left to fend off dark forces.