Kogoro is invited as a guest to a wine appreciation party hosted by a wine collector named Murozou Honjou. While exploring the villa, Conan and Ran notice Honjou in an argument with a wine critic named Gorou Akamaru. From afar, Conan witnesses Honjou smashing a brick into Akamaru's skull. Conan runs to their location but is unable to find evidence of the assault.