Japan, 1709. The shogun is old and ailing. Amid the ever-treacherous intrigue in the court, Sano Ichirō has been demoted from chamberlain to a lowly patrol guard. His relationship with his wife Reiko is in tatters, and a bizarre new alliance between his two enemies Yanagisawa and Lord Ienobu has left him puzzled and wary. Sano’s onetime friend Hirata is a reluctant conspirator in a plot against the ruling regime. Yet, Sano's dedication to the Way of the Warrior—the samurai code of honor—is undiminished.