Most people will either go to Heaven or Hell once they die. Death, on the other hand, takes a chosen few to Quindecim—a pub where only pairs of individuals who die at the same moment may enter. Decim, an enigmatic character who also serves as the arbitrator, is present at the bar. He judges those who end up at Quindecim by challenging them to a life-or-death game. These games determine whether or not the patron's soul will be reincarnated into a new existence or be cast into the void, never to be seen again. From darts and bowling to combat games, each patron's real character progressively emerges as they stake their souls. Despite the fact that his tactics remain unaltered, the unexpected presence of a black-haired amnesiac causes Decim to reevaluate his own rulings.