A man lies in a darkened cell, consumed by pain and sickness. He does not know where he is. He does not know how he came to be there. He does not even know his own name. All he knows is that he is being tortured by a bizarre, bespectacled man, who addresses him only as a number - Twelve-Thirteen. Every day, Twelve-Thirteen is taken out of his cell and goaded into running a dangerous hazard course, apparently for the sole amusement of the bespectacled man. Today seems to be no different. But while Twelve-Thirteen sits brooding in his darkened prison, the door suddenly falls open with no apparent cause. To discover the answers to all of his questions, Twelve-Thirteen must adventure into the unknown world beyond the cell...