In a world inspired by feudal Japan, young Takeo is raised among the Hidden — a spiritual people devoted to peace — unaware that his father was one of the most feared assassins alive. When his village is destroyed and he is adopted by the noble Lord Shigeru, Takeo learns he has inherited preternatural abilities: hearing beyond human range, the power to create a double, and the gift of invisibility. Thrust into a world of clans, politics, and blood oaths, he must reconcile his peaceful upbringing with the lethal skills now awakening within him.

Takeo begins as an innocent boy thrust into violence, slowly mastering the supernatural gifts of the Tribe while wrestling with his conscience. He is drawn equally to peace and to the deadly arts he was born for — a contradiction that defines his entire journey. His partner Kaede is equally compelling: a fierce, strategically minded noblewoman who carves her own power in a world designed to diminish her.

Across four books, Takeo and the fierce noblewoman Kaede forge a love story set against the backdrop of civil war, treachery, and prophecy. Their rise to power brings fifteen years of fragile peace, but old enemies, foreign invaders, and an unfulfilled prophecy — that Takeo will die at the hand of one of his own — ensures the peace is never absolute. The series weaves themes of loyalty, identity, honor, and the cost of violence into an achingly beautiful epic.