Hell – A place where beings that have committed mortal sins during their lifetime are sent. It is a realm where even Soul Reapers are forbidden to interfere. When a group of vicious Sinners plot to escape from this eternal prison, they discover that Substitute Soul Reaper Ichigo Kurosaki is the key to their freedom.

When an artifact known as the "King's Seal" is stolen during transport from Soul Society, Hitsugaya Toushirou is assigned to retrieve it. Toushirou goes missing after a battle with the thieves, leading Seireitei to suspect him of treachery. They order his immediate capture and execution. Unwilling to believe him capable of such a crime, Ichigo, Rangiku, Rukia, and Renji set out to find Toushirou.

In Karakura Town, unidentifiable spirits begin appearing en mases. While attempting to deal with these strange souls, Ichigo Kurosaki and Rukia Kuchiki meet Senna, a mysterious shinigami who wipes out most of them. Senna refuses to answer any questions, so Ichigo is forced to follow her while Rukia tries to find out what's going on.

A mysterious reiatsu (spiritual particle) explosion occurs in the center of Seireitei in Soul Society, causing it to be destroyed. At the exact same time, a major change overwhelms Kuchiki Rukia, which leaves her losing something important inside. Urahara Kisuke sends Kurosaki Ichigo to Soul Society to investigate the disturbance. Upon reaching Seireitei, Ichigo is attacked by his ally shinigamis.

When a disturbed teen named Todd runs out of bullets in an attempt to commit suicide his call to a former bullet shop turned pizza place changes his life, hopefully for the better.