A woman named Masami Hirota shows up at Kogoro's Detective Agency and asks him to find her father, Kenzou Hirota. She was reunited with her father when they located him in a horse racing track. The next day, Kenzou was found dead and Masami missing. Meanwhile, another detective is tracking Kenzou down for his client, Akira Hirota.
In the manga version of the story Gin and Vodka are the masterminds of the case (rather than Okita), and they end up killing Masami Hirota/Akemi Miyano who informs Conan of the organization's existence. This would lead to Ai Haibara's appearance in the series.
