Conan reveal to them that culprit is Rinpei Urushiya. Takagi lets it slip he and Sato have slept together. Rinpei reveals he is Taii old owner who had him for a year and a half while he was kitten who was stray. He gave to Teishi when his wife was suffering from a animal loss. After the case, soon Taii went around for a bit and ended up with Azusa.
Conan, Ran, and Sonoko head to a cabin in the woods with Masumi to meet some of her brother's old friends to solve a mystery. Along the way, they saw a woman dressed in all red hiding but vanished when seen. When Conan and co. arrive they meet the friends of Masumi's brother: Tamami Minegishi, Sumika Kawana, Masaie Hakuya, and Jinsuke Ninda. Ran mentions the woman in all red thinking she was apart of the friends' group, and everyone panics believing her the killer, the Red Woman- who got her name by killing her husband who was having an affair, soaking her coat in blood- who killed their friend Satoko in the nearby bog 15 years earlier; since then, strange things have happened at the villa, so Masumi was asked by her brother to investigate. Ran, Sonoko, and Sumika clean the dining area and find the bath prepared, and since they finished their chores they get ready to soak. Masumi and Conan accompany Jinsuke for groceries, and on their return find Masaie dead in the bath tub the girls were about to use full of floating tomatoes.
File 865 was accompanied by a special booklet with information about major characters and the Black organization that had not been revealed in the manga, an interview with Gosho, and images of the drawing process for the file.
