Plot summary

In a remake of a well-known Japanese mystery, a man in Kobe does not have a family. He receives a visitor who is a researcher one day who has noticed that the man has a well-off family in Okayama. This village is called Yatsuhakamura. This family has been there for four hundred years. The man decides to visit his new-found family only for a series of murders to coincide with his arrival. This family's lawyer hires a private investigator who begins working on the crimes.