The game is set one year after the events of the first game. Long before humanity existed, death was an unknown, equally distant concept. When death first came to the world, the "Messenger from Afar" was born. With time, the Sealing Rite was held to seal Death behind Hell's Gate. At that time, two worlds, one near and one far, were born, beginning the history of life and death. Half a year has passed since Suzaku's madness, and the underworld is still linked by a great portal. (wiki)