Kogoro has won another contest and so he, Conan and Ran go on vacation, where four friends recognize him as the famous detective Kogoro Mouri. He has dinner with them, which is interrupted by a rude man trying to buy one of the friends’ businesses, but they refuse to sell.

Conan went along with Kogoro during the investigation.

Kisaki found herself defending a burglar being charged by the state prosecutor with murder instead of manslaughter

Kazuyuki Kawai invites Kogoro, Ran, and Conan to his houseboat for dinner and to view the fireworks. During the fireworks, Kawai’s guest, Tsuneo Yamasaki, is found dead from electrocution.

The police department receive a ransom demanding a large sum for Ran’s life. The police send their men to search around town for Ran. Conan and Haibara soon deduce from Ran’s description of her location.

The Detective Boys along with Kogoro, Ran, and Sonoko take a trip to Kumamoto, Kumamoto so the Detective Boys may participate in a Tennis Tournament. While Sonoko is in the bathroom, Ran overhears three men planning to murder someone. To hide their conversation, the men kidnap Ran.

When Conan and Heiji find the name “Kaa” and “Chi” written by Miyako many years ago, they realize who the names are referring to. Conan and Heiji have an epiphany and realize the culprit faked Tiara’s time of death.

Heiji tells them the Anchor he found was approximately four to five years old, the same time period on which the strange events have been occurring on Onikame.

Heiji and Kogoro are invited to Okinawa to solve the case of a body that was found on Onikame Island alongside a mysterious carved message by the body.

Conan’s radar runs out of power forcing the group to search for Mitsuhiko in the forest.