One night. Ten strangers. Zero escape. In the jagged peaks of the Cascades, a predator is hunting. Jack Howard is a man who prides himself on control, but his world collapses when a cataclysmic mudslide traps him and nine other strangers inside the isolated Blackwood Stop. Among them is Alice Thorne, a Hollywood icon escaping a career-ending scandal, and a hulking convict whose chains have just been shattered. When a body is found with a room key pinned to its chest, the survivors realize they aren't just stranded-they are part of a lethal sequence. As the numbers count down and the mountain dissolves around them, the line between reality and madness begins to hemorrhage. In this psychological house of mirrors, the walls are closing in, and every secret is a death sentence. Will Jack find the truth before the count reaches one, or is the Architect of this nightmare closer than he thinks?