Deceived into killing his own prospective father-in-law, the righteous samurai Raizou Kurima is consumed by guilt. To restore his honor, Raizou vows revenge against the lord who issued those misleading orders. In his quest, he is assisted by Yuuen Usui, a self-proclaimed merchant of all trades who is actually one of the Revengers—assassins who seek justice for the wronged and deliver bloody retribution on their behalf. Tragedy appears destined to follow Raizou as he becomes increasingly entangled with members of the Revengers. As he begins working as a vigilante alongside them, the complex web connecting the corrupt Japanese political elite, unscrupulous Europeans, and the Revengers gradually comes to light. The deeper he gets into these affairs, the more Raizou realizes that justice is as deceptive as the honor he sought to redeem.