Entitled "Gekijouban Bleach: The DiamondDust Rebellion Mouhitotsu no Hyourinmaru"
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 and clear his name. Meanwhile, Toushirou is still searching for the thieves, and stumbles upon a dark secret involving a shinigami long since dead.