The Bakumatsu era is ending. The old shogunate order is dying and the Meiji government is rising, and in the capital, the Shinsengumi fight to defend what remains of the feudal world. Chizuru Yukimura traveled to Kyoto to find her missing father—and found herself caught instead in the middle of the Shinsengumi's struggle. These men are not simply warriors holding a political position. They share a secret that touches the boundary between the human world and something beyond it.