Ash is a member of a sect known as Rōshun, assassins who offer protection through the threat of vendetta. He is a man still haunted after many years by the death of his son. Forced by his ailing health to take on an apprentice, he chooses Nico, a young man living in the besieged city of Bar-Khos, whose own father is long gone, a deserter of his family. At the time, Nico is hungry, desperate, and alone in a city that finds itself teetering on the brink.
When the Holy Matriarch’s son murders a woman under the protection of the Rōshun, he forces the sect to seek his life in retribution.