College student Hachi is fed up with his life and seeking a change, leading him and his best friend Tanuki to perform a strange ritual they discover online. The next day, the mysterious "Izzy" arrives in his life.

Izzy is injured in a fight with her old, undead nemesis. Hachi must figure out how to save her. But to do so, he needs to know the truth of Izzy's mission. Detective Inukai's investigation deepens.