"Kings" are people who have been given extraordinary supernatural powers and the capacity to recruit others into their tribes. The Kings' duties include safeguarding the lives and honor of their clansmen. Yashiro Isana, an ordinary student, is charged with homicide when a video documenting the horrible murder of a Red Clansman goes viral. A chase for his head is now underway, bringing him into touch with the famed "Black Dog" Kurou Yatogami—a talented swordsman and martial artist determined to carry out the orders of his late master, the Seventh King. Meanwhile, the current Red King, Mikoto Suou, faces his own doom as the hunt for Yashiro intensifies. However, a larger scheme emerges throughout Yashiro's fight to establish his innocence.