After breaking up with his girlfriend, grad student Haruaki Fusaishi goes on a motorcycle trip to forget her, only to end up stranded in the remote settlement of Yasumizu. The next day, as he is repairing his bike, a mysterious mist drifts in, and all the villagers shelter inside their homes. Confused, Haruaki sees a mysterious figure with the body of a human and the head of a wolf that kills him.

Haruaki finds that instead of dying, however, he has instead looped back in time. After managing to hide from the creature this time, he discovers the village must engage in a ritual known as a "feast." Several of them have been replaced with spirits of ancient "wolves" that will kill one villager each night, and it is up to the villagers to discover who amongst them are the wolves, and execute them. Caught in an all-out war of doubt and trust, can Haruaki survive and discover the mysteries behind the feast and his looping...?