Japan, March 1700. Near a Shinto shrine in the hills, a windstorm knocks down a tree to uncover a human skeleton, long buried and forgotten. Meanwhile, in the nearby city of Edo, troops ambush and attack Lady Reiko, the wife of Sano Ichiro, the samurai detective who has risen to power and influence in the shogun's court. The troops who attacked Reiko appear to belong to Sano's fiercest enemy, Lord Matsudaira, who denies all responsibility. But if...