Squad 10, led by Captain Hitsugaya and Lieutenant Matsumoto, is tasked with safeguarding a royal convoy transporting the mystical 'Ouin.' Chaos ensues when attackers ambush the procession, snatching the artifact and casting suspicion on Hitsugaya. Branded a traitor, Hitsugaya flees, leaving his comrades in turmoil. Across realms, Ichigo encounters the wounded Captain, igniting a quest to vindicate Hitsugaya and unearth the Ouin's thieves. Amidst the pursuit, Hitsugaya battles inner demons from his past, adding complexity to the unfolding mystery.