A mysterious man who calls himself "Muramasa" appears in the Seireitei to declare war against the Soul Reapers. Using his powers, Muramasa gives physical form to the Zanpakuto and liberates them from the captains and lieutenants of the 13 Court Guard Squads. Without the use of their weapons, the Soul Reapers now find themselves in a tough battle against the Zanpakuto who have turned against their former masters.
Uryu is rushed to the hospital after being cut down by an unknown attacker. As Ichigo becomes frustrated over not being able to do anything when his friend was attacked, he learns that Keigo and Mizuro have disappeared.
Unable to bear seeing his friends get attacked, Ichigo decides to call on Ginjo for some answers. At his hideout, "Xcution," Ginjo tells Ichigo of his goal to restore Ichigo's lost Soul Reaper powers, as well as demonstrating his own unique power, "Fullbring."
On her way home from school, Orihime is suddenly stopped and asked to die by a man named Shishigawara. Confused at first, Orihime quickly realizes that Shishigawara may be related to Uryu's attacker, and prepares to fight.
Ichigo and Chad rush to find Orihime, who they believe may be in danger. Meanwhile, Orihime attempts to stop Tsukishima from leaving the scene, but is instead stabbed by his Fullbring power, "Book of The End."
Ichigo asks Ginjo to let him fight one of the Xcution members for his training. But Jackie, who detests the power of Fullbring, finds Ichigo's request selfish and refuses. Meanwhile, danger closes in on Chad.
Tsukishima breaks into the Xcution hideout where Ichigo is training. Learning that he was the one who attacked Uryu and Orihime, a furious Ichigo proceeds to attack Tsukishima. But with his Fullbring power still incomplete, Ichigo finds himself gradually overpowered by his opponent.
Uryu asks Orihime to heal his injuries after sensing that his assailant has now made contact with Ichigo. Meanwhile, Ichigo enters his training with Ginjo inside Yukio's Fullbring power "Invaders Must Die."
On New Year's Day, Izuru hosts a kite-flying contest in the hopes of everyone having a good time. Meanwhile, Rukia is practicing a dance she will perform for the New Year's Celebration Ceremony but cannot seem to get the steps right.
Uryu begins his own investigation to track down the enemy who attacked him. As he goes around searching for clues, he notices that people close to Ichigo are acting strangely. Meanwhile, Ichigo's Fullbring training is nearing its completion.
Ichigo escapes from his house in confusion after witnessing his friends and family welcoming Tsukishima as if they've known him for years. Regrouping with Ginjo, Ichigo learns that the same change has also happened to Riruka and the other Xcution members.