Conan and others are studying in the library of Didan Primary School. At this time, Teacher Kobayashi found something in the crack of the bookshelf. It's an old leather wallet with 1 piece of paper in the middle. Conan has a feeling of deja vu about this wallet ... 10 years ago, Xinyi and Xiaolan, first-grade primary school students, sneaked into the primary school library on a full moon night in order to find out the truth of the rumor that the school was haunted. There, Shinichi took the wallet from the mysterious man and accepted the challenge of reading the password recorded on the paper. ?

473? Kudou Shinichi's adventures as a teenager (Part II)?

Conan continued to talk about the memories of the wallet in the library. 10 years ago, Shinichi, who accepted the challenge of Mystery Man, together with Xiaolan and Agasa Hiroshi, deciphered 1 and the second code word, and the third code word "Evidence of destroying Okubo? Bite loneliness with a turbid voice. " Xinyi cracked the first half of the code and went to Dajing Post Office. Because the first two times were to hide the secret code on something red, the new one went straight to the red mailbox to find out the clue.