The son of a world famous mystery writer, Jimmy Kudo, has achieved his own notoriety by assisting the local police as a student detective. He has always been able to solve the most difficult of criminal cases using his wits and power of reason.
The Detective Boys, including Conan, accompanied by their teacher Miss Kobayashi, visit the Rampo residence. The storehouse which Rampo used as library entailed a great deal of valuable books, stimulating the excitement of Conan and the rest. In the meantime, Detective Sato and Detective Takagi arrive, whereupon they are informed that a murder case has taken place in a nearby park. And - which is more - the victim's belongings seem to be related to the storehouse that was often closed to the public... The modern-day Detective Boys shall challenge this difficult case!