Conan's memory of the case ten years ago continues. With help from Professor Agasa, Jimmy and Ran attempt to solve the mystery given to them by the mysterious man, and uncover his identity. As it turns out, the mysterious masked man was the original Kaitou Kid, who was actually hoping Jimmy would turn to Booker Kudo for help
Al termine del racconto, Conan rivela ai compagni che il mistero era stato creato da Yusaku Kudo per permettere a Shinichi una pausa dallo studio.
Shinichi finalmente resuelve las pistas dejadas por el hombre misterioso con el apoyo de su padre y encontrará una bonita verdad además de un cambio en su relación con Ran.