Genshiro is a famous Kenkaya of Edo. He turns up in incidents to get interfering fees but gets involved in a terrible incident… the Shichikudano Whistles known as Akinonanakusa and her seven sisters. The sisters were killed one after another. The whistle, in fact, shows the place of 300 thousand Ryo that their ancestors left. Genshiro gets one of the whistles and devotes himself try and solve the mystery.