The “fun quarters” of Edo are no strangers to murder. But this time the victim of unknown criminals was none other than the heir to the shogun himself! The city is filled with rumors of conspiracies and secret intrigues and relishes the scandalous and obscene details of the murder. Sano Ishiro, who entrusted with the investigation, he understands: the only real witness to what happened is a beautiful courtesan nicknamed Wisteria, with whom he himself was once passionately in love. But all attempts to find Mrs. Wisteria end in failure. Perhaps she went into hiding to avoid death? Or maybe she was forced to disappear?