After accidentally tuning to a late-night radio show, a small-town and sexually repressed woman, calls in to get some answers to her pressing questions.

In a massive, mysterious chamber, fifty strangers awaken to find themselves trapped with no memory of how they got there. Organized in an inward-facing circle and unable to move, they quickly learn that every two minutes, one of them must die…executed by a strange device in the center of the room.