Ichigo Kurosaki and Rukia Kuchiki are Soul Reapers, soldiers trusted with ushering the souls of the dead from the World of the Living to the afterlife realm known as Soul Society and with fighting Hollows, monstrous lost souls, white scary face with big hole in the chest, invisible to ordinary human eyes who can harm both ghosts and humans. After defeating a Hollow in a local park, unidentified ghost-like spirits begin to appear, before a mysterious Soul Reaper named Senna appears and destroys the spirits. Ichigo and Rukia confront her, but she refuses to answer any questions and leaves. Ichigo follows Senna, while Rukia returns to the Soul Society in search of answers.