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 & training ahead of him. Deep beneath Kisuke's Urahara Shoten Ichigo practices his fighting & hones his spiritual energies & now he must face the most daunting challenge of all: prevent his Chain of Fate from consuming itself or be forever transformed into a soul-devouring Hollow!