Detective Kyosuke Kozus Murder Reasoning 3

The third work of the popular series depicting the famous detective Kyosuke Kozu Blind musician Ryoichi Kashiwagi died of a heart attack His father Shigeyuki is already bedridden and has billions of Japanese yen in assets Ryoichis wife Yukiyo and Ryoichis younger sister Tsuruko have a dispute over these assets Newspaper reporter Matsushita who met Ryoichi just before his death was interviewed and was told that there was something unnatural about Ryoichis cause of death Soon Tsuruko died mysteriously Matsushita decides to have Kyosuke Kozu a university professor and a famous detective solve the case