Conan and the Detective Boys arrive at a candy shop that's just reopened. A band is playing, and the kids are given plums to celebrate the grand opening. Ayumi, Mitsuhiko, and Genta are fascinated by their first traditional candy, but Conan doesn't seem interested. Genta calls Conan arrogant for acting all grown up. The two get into an argument, and Conan leaves alone. On his way home, an old man jumps out of an alleyway, declares he's seen an omurice corpse, and requests Conan's help...!