Makai Knight Mikage Jinga, along with his partner Makai Priest Fuusa and younger brother Touma, hunts the beasts known as Horrors that are born from the human malevolence known as “Inga.” Although Jinga’s skill as a Makai Knight is incredible, a traumatic incident that happened to his family causes him to hesitate to cut down the humans who have been possessed by Horrors. One day, Jinga receives a deep wound while fighting a Horror. From that point on, strange things begin to happen around Jinga and his allies.