While the day belongs to humans, the night belongs to yokai, supernatural creatures that thrive on human fear. Caught between these worlds is Rikuo Nura. He's three-quarters human, but his grandfather is none other than Nurarihyon, the supreme commander of the Nura clan, a powerful yokai consortium. So, Rikuo is an ordinary teenager three quarters of the time, until his yokai blood awakens. Then Rikuo transforms into the future leader of the Nura clan, leading a hundred demons.

Rihan and Kurotabo join forces in decadent Edo Period Japan, forming an otherworldly bond in order to vanquish their enemy. Little do they know that the Hundred Stories clan and its leader - the dreadful, dismembered Sanmoto - are far from defeated! Back in the present, a yokai named Kudan is spreading rumors that Rikuo is bent on world destruction and must be stopped by any means…