The episode begins with Uryū, Chad, and Orihime meeting Muramasa, who has entered the World of the Living to further his plans.
Using effective teamwork, Uryū and Chad initially appear to gain the upper hand against Muramasa. Bleach (Dub) Episode 249
For fans following the series' production history, this arc was a major deviation from the manga's Arrancar storyline, designed to allow the manga more time to progress. Bleach 249 - BLEACH (Season 13, Episode 20) - Apple TV The episode begins with Uryū, Chad, and Orihime