Kogoro, Ran, and Conan are walking when they witness a car attempting to kill a girl and her chauffeur.
Attempted Murder
Location:Streets
Victims:Eiko Suzaka and Kaede Nakakita
After saving the two, they learn that the girl, Kaede Nakakita, is an adopted child of a wealthy man named Ouzaburo Katayose. Katayose invites the three to his estate to express his gratitude towards them. As Conan explores the estate with Nakakita, he finds evidence that someone wants to kill her and deduces the culprit is either Katayose's son, Ogito Katayose, or his daughter, Nobue Katayose whom are after the inheritance. Later, Katayose is found dead after consuming poison in his tea.
Murder
Location:Katayose household
Victim:Ouzaburo Katayose
Cause of death:Cyanide poisoning
Suspects:Eiko Suzaka, Nobue Katayose, and Ogito Katayose
The chauffeur Eiko Suzuka, then reveals Katayose's will detailing the location of his red leaf treasure.
Part 2
Nobue is found dead with a poisoned arrow in her back while holding a clean arrow in her hand.
Murder
Location:Near the treehouse
Victim:Nobue Katayose
Cause of death:Poison from the arrow shot
Suspects:Ogito Katayose
Ogito's crossbow is found near the scene leading the police to suspect him. Later, Ogito falls down a cliff due to being shocked by an electric fence.
It turns out that Ouzaburo Katayose had committed suicide. His will was then opened, but the will was a cipher. Ogito Katayose figured out the cipher and left the house. Nobue Katayose saw him leave and realized he must have figured out the code. She hatched a plot so that he could not claim the inheritance. She took one of the bolts to Ogito's crossbow, made a cut on her sleeve with it, threw his crossbow into Kaede's treehouse, and screamed in the middle of the forest with the intention of framing Ogito for attacking her. Before Conan arrived however, Ogito had stabbed her with a poison tipped arrow in the back. Eiko Suzaka saw this happen, and followed him to the electric fence. Ogito had turned off the electricity and started climbing to the poles with the mirror attached to them (the inheritance is in there). Eiko turned the electricity backed on, which electrocuted him, and made him fall to his death. She did this because she thought Ogito had murdered Ouzaburo. The inheritance was a ruby for Eiko, and for Kaede to have all of his money, for Ouzaburo once loved Kaede's grandmother.
