The Developer of the Modified Souls
The captains and lieutenants of the Thirteen Court Guard Squads thought to have fallen in battle return to fight the Reigai. Meanwhile, Ichigo’s spirit energy and Hollow powers continue to grow unstable, forcing him to rest for the time being while Urahara and Kon continue there investigation on Inaba. Urahara and Kon later find out about Yushima Okouyo, the shinigami who created Inaba and Nozomi. When visiting Yushima's cell in the Maggot's Nest, they get attacked by the reigais of Soi Fon and Omaeda, but are later defeated by Urahara. The two visit Yushima's cell, only to find him unresponsive, leading Urahara to conclude that Yushima will never gain consciousness. Meanwhile, Ichigo's hollow side finally takes over and escapes the building he was in.
Aired 30/08/2011EP 337 - The Developer of the Modified Souls

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.