Third-year high school student Koyomi Araragi is human again. Cured of his vampirism, he seeks to help other supernaturals with their problems. Koyomi becomes involved in their lives, revealing secrets in people he once knew.
Set after the events of Bakemonogatari, one of the men who deceived Hitagi, Kaiki Deishu, returns to town to spread the incantation which cursed Nadeko before. Koyomi's sisters Karen and Tsujiki try to stop him but.