37화: 노리코가 고코로의 도움을 받아 남자친구의 죽음과 관련된 남자를 찾다
Okaya Noriko comes to Kogoro’s office asking for help to look for a man named Kitagawa Tsuyoshi. She presents a rough sketch of Tsuyoshi along with a picture of his red sports car and the license plate. The next day while on the way to the aquarium with the Junior Detective Boys, Conan sees Noriko in funeral-wear and follows her to the grave of her old boyfriend, Yamaguchi Tatsuo where she meets an acquaintance of hers, Saeki. Conan shows himself to Saeki, who is the doctor who rehabilitated Noriko after she and Tatsuo were involved in a car accident; Noriko barely escaped but Tatsuo burned to death. Conan finds out Tatsuo had an affinity for growing Christmas cacti and all his plants went to the doctor after his death. He also discovers that Noriko, after the crash, rehabilitated after only three months instead of the expected six, due only to motivation and adrenaline. Conan concludes Noriko asked Kogoro to find Tsuyoshi so she can avenge Tatsuo’s death. Conan and Saeki meet up with Kogoro and Ran at Tsuyoshi's address only to find Noriko about to burn Tsuyoshi and his girlfriend Naomi alive. Using Tatsuo's cacti and a bit of coaxing, Conan calms Noriko and she surrenders. (Source: Wikipedia)