In Karakura Town, spirits that are un-identifiable begin emerging en mases. While trying to take care of one of these strange souls, Ichigo Kurosaki and Rukia Kuchiki meet Senna, a shinigami who wipes out nearly all of them. Senna refuses to answer some questions, therefore while Rukia tries to find out what's happening Ichi-go has been made to follow along with her.