Rukia Kuchiki, the ex-Soul Reaper responsible for Ichigo's transformation, is on the lam. Her brethren at the Soul Society are quite displeased with the fact that she transferred the powers of a Soul Reaper to a human and have dispatched two of their strongest agents to neutralize the situation. Their mission is twofold: to return Rukia to the Soul Society so that she may pay for her crime and to deal with Ichigo - permanently. Ichigo knows that to retrieve Rukia from the Soul Society, he'll have to enter that world himself. But his fight with Rukia's brother Byakuya showed, in no uncertain terms, that Ichigo still has a great deal of rigorous study and training ahead of him.