Centuries ago, Ginrei Kuchiki, Byakuya Kuchiki's grandfather, and his son-in-law Koga Kuchiki were assigned to bring down the rebel forces threatening the Seireitei. With his Zanpakuto Muramasa's power, Koga wipes out the renegade Soul Reapers one after another, and soon his strength becomes known throughout the Soul Society. Yet Koga himself was frustrated by the fact that his father-in-law Ginrei did not seem to acknowledge his accomplishments.
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.