Fate highly exalted Sano Ishiro. He became the right hand of the shogun himself, achieved honor and respect, gained wealth and hoped that he would never again have to investigate complicated crimes. However, very soon his hopes turned to dust. Reiko, Sano’s wife and assistant, pregnant with their second child, is accused of murdering... Prince Mori. There is testimony against her from numerous witnesses. And now Sano intends to prove Reiko’s innocence at all costs - otherwise she will executed. In desperation, he grabs the only evidence - a bloody chrysanthemum flower found near the victim's body...