Following a devastating ambush by Quincy King Yhwach, the Soul Reapers in the Soul Society regroup and grieve their fallen comrades. With many captains forced to train without their potent Bankai abilities, Ichigo Kurosaki, instrumental in repelling Yhwach's prior assault, faces the daunting task of undergoing intense training to stand a chance against his divine foe. As Yhwach gains momentum and secures Uryuu Ishida as his successor, the Soul Society braces for further attacks from their relentless nemesis. While Ichigo grapples with his own limitations to unlock new strength, the Soul Reaper leaders battle for survival in a race against time.