Ran is trying to keep in touch with Masami Hirota but the dial is constantly incorrect. She feels that there is something wrong and goes to her apartment, alongside with Conan and Kogorō. Arrived at the apartment, it is known by the land lady that Kenzō Hirota have been killed and that murder was the case. Meanwhile, Kogorō went to Inspector Megure asking who killed Masami's father. Megure tells them a giant did that and showed him the glasses he has found. Kogorō said it was Masami's glasses, which he thinks that something has happened to her. Conan reminds that tracking sticker he put accidentally on Masami's watch and uses his Criminal Tracking Glasses to find her. Ran sees the same suspicious man and captured him. The Detective says that he is finding for a man named Akira Hirota, which is the giant Conan has seen earlier.