Synopsis

The Detective Boys, Haibara, Kogoro, and a few others embarked on a journey to Mount Aso. There, they encountered a young boy named Justin and his mother. Justin proudly displayed a book filled with stamps, each one commemorating a different tourist spot on the mountain. After their meeting, the group parted ways. Later, during a brief respite, a man left a bag unattended on a bench. Another individual retrieved the bag, leaving behind a stuffed toy in its place. Ayumi attempted to return the to