When the gates of Hell appear in Karakura Town and strange spirits called Unforgiven (Togabito) escape, Rukia Kuchiki and Renji Abarai are sent to investigate. Ichigo Kurosaki's family is targeted by the Unforgiven, who are led by Shuren, and Ichigo's younger sister Yuzu Kurosaki is abducted.
This is easily the best Bleach movie yet. I was a big fan of Memories of Nobody, and didn't care much for the other two movies, but this blew all of them out of the water.
Didn't follow the same lame formula as the others, had awesome animation, an awesome story. And to finally get to see Hell which was only seen/mentioned in episode 5 of Bleach (Chapter 12) was totally awesome. This was the only movie even worth seeing. (Apparently there was a special episode 299 that also featured the Hell world and villains... must see this now, I missed it)
This really didn't feel anything like the other movies. We get introduced to a whole new world with fantastic designs. I kept finding myself excited to see more. And again, the animation was top notch the whole way through.