A pop-up book and pink smartphone arrive at the Mori Detective Agency. The book turns out to be a warning of the serial bombings that have been occurring. The culprit is Hirukawa Takuji, half-brother of Imai Kenichi, the now deceased author of the book, and a man with a previous bomb manufacturing conviction. Due to his hatred of detectives, Hirukawa chose the famous Kogoro to become involved in the case. The locations of the bombs are riddles, and Conan works with Kogoro, Megure, and publisher Tomonaga Hiroyuki to find them, but...