The Day Kogoro Mori Discontinues His Detective Business (Part 1) Kogoro receives a request from a client named Ryouzou Gamou to find a witness to confirm his alibi. On the sixth day Gamou calls Kogoro and tells him he has lost hope in him. The next day, Gamou is found hanged in a forest an hour in distance away. The police suspect it to be suicide but Kogoro reveals it is a murder, as Gamou could have killed himself at home if he wanted to. After interrogating Gamou's nephew, Kyousuke Arai, Kogoro returns home to find news reporters who question Kogoro about the suicide revealed to be murder. The next day, Kogoro heads to the horse track and meets up with detective Isao Takeoka, the detective who falsely accused Gamou of a crime five years ago...