Conan and his friends happen upon owner of Tamaki`s Used Bookstore, Tamaki Yujiro, and his son Ichiro having an argument. The store has become run down, and Ichiro wants his father to close it down. Later, Conan and his friends go to the park next to the bookstore, which has a genuine steam engine on display. When the steam engine`s wheels start moving at 15:00, Conan and his friends take a commemorative photo with Ichiro, who happened to be passing by. Later, they notice the shelves in the bookstore have fallen like dominos, crushing Yujiro beneath them...