At the theatres, the Detective Boys run into Shiratori who is depressed Sato's affection is being directed at Takagi. Shiratori reveals that he is bind to Sato because of an encounter he had with her in the past. Shiratori explains Sato as a young girl stood up to two thieves by herself. Shiratori helps her stop the thieves and in return receives from her a drink with paper folded sakura. Conan questions whether that girl was actually Sato as their personalities differ greatly. During the movie, Shiratori runs into a woman named Nami Kasakura who offers him a drink with paper folded sakuras causing Shiratori to consider the possibility she was the girl in the past. After the movie, Kasakura tells Shiratori she is being stalked and asks him to investigate. At her apartment, Kasakura's boyfriend is found dead. Conan suspects Kasakura but her alibi supposedly states she was at the theatre the whole time.
L'inspecteur Shiratori passe sa journée de repos au cinéma, où il croise par hasard les Detective Boys. Ils se trouvent tous embarqués dans une affaire criminelle, à travers laquelle est révélée l'origine des sentiments de Shiratori pour Sato.
Shiratori è convinto che Sato sia la donna del suo destino perché, quando era piccolo, aveva incontrato una bambina che le somigliava molto e che gli aveva cambiato la vita
Shiratori va al cine y allí se encuentra con la liga juvenil de detectives. Allí conoce a una chica, Nami Kasakura, con la que entabla amistad, y ella, al enterarse que es policía, le dice que un acosador la persigue. Cuando los niños y Shiratori van a su piso, encuentran a su novio muerto.
Shiratori va al cinema i allà es troba amb la lliga juvenil de detectius. Allà coneix una noia, Nami Kasakura, amb la qual entaula amistat, i ella, en assabentar-se que és policia, li diu que un assetjador la persegueix. Quan els nens i Shiratori van al seu pis, troben el seu nòvio mort.
