Six people awaken suddenly in an isolated, endless cornfield. Six objects remain after they have been stripped of their belongings: a gun with a single bullet, matches, a lantern, a knife, a compass, and a flask of water. As ominous sirens blare in the distance and traps arise at every turn, the party understands that it has been thrust into a cat-and-mouse game with an invisible evil, and that its existence rests on completing a fiendish and lethal riddle.