Sonoko, Ran, and Conan go to Teitan High School to investigate mysterious events supposedly caused by the grudge of a dead student named Hideaki Hosaka. Ran and Sonoko greet some friends and introduce Conan to them; the friends tease Conan and Ran by saying Shinichi are Conan rather alike. Conan then runs into the real Dr. Araide, who has returned. He informs Conan of that he had been hiding overseas with his family, and told him that Jodie told him to tell Conan everything. Ran asks Dr. Araide to help investigate the ghost story with them.
Sonoko explains the stories showing that the student's ghost is terrorizing the school in the early morning hours. The first is that a girl heard the sound of someone sobbing in the sports warehouse where the dead student's desk is stored. After bringing a professor to investigate, the crying had stopped and, no one was found inside. Kazumi Tsukamoto interrupts after overhearing the story, claiming it
Later the desk is found outside with a name on it. What's strange is that it's raining, yet, there's no footprints in the mud.
Suspects:Kazumi Tsukamoto, Seko Kunishige, Monobe Masao
Strange things have been occurring early in the morning at Teitan High which are attributed to the grudge of a former student, Hideaki Hosaka, who died after falling down stairs two years ago.
Conan, using Sonoko, solves the case and reveals the culprit was Seko Kunishige, a close friend to the dead student Hideaki Hosaka. Kunishige reveals that he found his friend's desk in the storage room with a name on it, thinking he was bullied and then murdered. Monobe Masao reveals the true story of events, Hosaka died saving him from falling backwards down the stairs while holding a heavy sculpture. The sculpture crushed Hosaka. Kazumi Tsukamoto explains that Hosaka's desk was put in the storage room so that it could be brought out for graduation in memory of Hosaka and was not to hide evidence. Dr. Araide, who was the first doctor on the scene, concocts a white lie about Hosaka's last words to say held no grudges when he died in order to soothe the third years.
After the case, Dr. Araide receives a call from Jodie who is checking on his reintegration into Teitan High. Dr. Araide says it went smoothly but asks Jodie if Vermouth was really an evil person because all the students and teachers had nothing but praise for the disguised Vermouth's kindness and compassion. Jodie angrily hangs up on Araide after yelling, "How in the world can someone be kind if she kills people with a smile!?"
