Heiji won a bet in the previous episode and so it's decided that they're all going to the high school baseball finals in Koshien Stadium. But there is a mysterious guy willing to commit a suicide bombing there. This incident just puts more stress on Conan and Heiji, even though they came to a ball game for amusement and relaxation. The unknown person gives them a chance to stop him, however. Heiji and Conan are both struggling to crack the codes, sent by the mysterious man, before the bomb goes off. Earlier, Conan and Heiji witnessed the person walk by them and they thought he dropped his cell phone, when he purposely left it there to "play the inevitable game" with them, consisting of cryptic text messages. In order to solve this case and save countless lives, Heiji and Conan would need a lot a background information dealing with America's favorite pastime, baseball.
À la suite de l'affaire précédente, les Môri vont à Osaka avec Heiji et Kazuha pour voir la finale de baseball au Koshien Stadium. Cependant, un poseur de bombe suicidaire menace de faire exploser le stade, et laisse des indices pour que Conan, Heiji, et l'inspecteur Otaki de la police d'Osaka empêchent la catastrophe !
Heiji, Conan, Mori, Ran und Heijis Freundin Kazuha schauen sich im Koshien-Stadion die Finalwettkämpfe der nationalen Baseball-Meisterschaften der japanischen Oberschulen an.
Conan, Kogoro, Ran, Kazuha ed Heiji sono allo stadio e stanno assistendo ad una partita dei campionati giovanili di baseball. Conan sente un cellulare squillare. Heiji risponde e sente la voce di una persona che minaccia di togliersi la vita facendo saltare in aria l'intero stadio
Después de resolver el caso en el que apostaban ir al Koshien o al Takarazuka, Conan, Ran, Kogoro, Heiji y Kazuha van al estadio Koshien para presenciar la final de béisbol entre institutos, pero una vez allí encuentran un móvil donde llama un hombre diciendo que quiere suicidarse y llevarse a los demás por delante. Tendrán que impedirlo a toda costa ya que incluso Kazuha y Ran están en peligro.
