The Flying Jack-o'-lantern Conan Edogawa visits Cafe Poirot because Ran and Kogoro Mouri have gone out. There, Azusa Enomoto, a waitress, is making jack-o'-lanterns for Halloween. While helping her, Conan learns that a "pumpkin ghost" has recently been discovered and is the talk of the town. A woman, Tamie Kono, comes in in a great hurry, followed by Tomomi Koriyama and Gouji Mizunuma. The three live next door to each other. They were making jack-o'-lanterns for the "Yonehana-cho Shopping Street Halloween Pumpkin Contest" with pumpkins given by Azusa, but the pumpkins were stolen...