Two centuries after the establishment of the Joseon dynasty, a long war breaks out because of the Japanese invasion. Four beings, both human and celestial, struggle to correct the balance of the universe: Eun-dong, a boy who lost his mother to the war and is now searching for his father; Tae-eul, the Angel of Death who seeks to solve the mystery of the lost souls, the honorable 800-year-old Tiger Heuk-ho, and the nine-tailed fox, Ho Yu-hwan. This is their story.