The demon Jakotsumaru attacks humans to collect bones in order to revive his father, the demon Tökotsu after it was slain by Moroha, who retrieved the Red Rainbow Pearl from his corpse. After learning the situation, Kohaku sends Towa and Setsuna to deal with it, meeting Moroha, while she plans to receive a large reward for it to pay off her debts. Accompanied by Myöga, who reveals Tökotsu is one of the Four Perils who work for Kirinmaru, the three discover Jakotsumaru's hideout and confront him...