Sode no Shirayuki vs. Rukia! The Delusion of the Heart
Rukia rushes back to the 6th Division HQ and is reunited with Renji. However, Byakuya's status remains unknown after the night of the zanpakutōs' attack. Ichigo and Yoriuchi arrive in Soul Society and split up to search for clues. Rukia returns to Byakuya's compound and finds Sode no Shirayuki attacking and freezing the shinigami there. She tries to reason with her zanpakutō but Shirayuki demands her freedom. After a fierce battle, Rukia loses to Shirayuki and is about to be frozen to death when Ichigo arrives to rescue her. However, he too is defeated by Shirayuki. Rukia attempts to get Sode no Shirayuki back to her by telling the zanpakutō how important she is to her. Using her kidō powers to restrain Sode no Shirayuki and herself, Rukia attempts to sacrifice themselves both in order to convince Shirayuki one could not live without the other. The resulting explosion injures Rukia severely. Sode no Shirayuki has a change of heart and attempts to reach out to her master, but Muramasa arrives and holds her back. Muramasa introduces himself to Ichigo and states that he is a zanpakutō.
Aired 11/08/2009EP 232 - Sode no Shirayuki vs. Rukia! The Delusion of the Heart

Bleach
Ichigo Kurosaki is a rather normal high school student apart from the fact he has the ability to see ghosts. This ability never impacted his life in a major way until the day he encounters the Shinigami Kuchiki Rukia, who saves him and his family's lives from a Hollow, a corrupt spirit that devours human souls.
Wounded during the fight against the Hollow, Rukia chooses the only option available to defeat the monster and passes her Shinigami powers to Ichigo. Now forced to act as a substitute until Rukia recovers, Ichigo hunts down the Hollows that plague his town.