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Stripped of their possessions, six strangers wake up in a remote, endless cornfield with six items -- a gun with a single bullet, matches, a lantern, a knife, a compass and a flask of water. As mysterious sirens blare in the distance and traps appear at every turn, they soon realize they're in a mysterious cat-and-mouse game with an unseen evil, and survival depends upon solving a diabolical and deadly puzzle. Wikipedia