AllMovie

Awakening naked in a barren white room with thirteen strangers, a woman discovers that she is the last contestant in deadly game of survival. Each of the fourteen strangers has been outfitted with lethal electronic collars that can be activated at a moment's notice. In order to escape and discover the reason for their abduction, they must draw on hints and tools from a mysterious box labeled "pieces." As each player is systematically eliminated, a new clue appears. The latest clue has revealed that one of the contestants is a murderer, but who is it, and are they willing to kill again if it means saving their own life?