During her school's Thanksgiving break, Zoey (Taylor Russell) discovers an intricately designed puzzle cube. Easily solving it, Zoey then enters an escape room — but this isn't like the escape rooms you play with a group of friends. This game, which Zoey plays with a bunch of strangers, quickly turns deadly. As each player gets picked off, those remaining realise it isn't about luck but about skill. It turns out there's a game master behind it all, and Zoey is set on taking him out. But what happens if the game master isn't actually the source of all this evil?