Kogorou Mouri, his daughter Ran, Conan Edogawa, and the Detective Boys receive an unusual invite to visit the Miracle Land theme park. However, they soon realize that they have fallen victim to a hoax and have only 12 hours to unravel an unsolved case. As they delve further into the mystery, Heiji Hattori, Kaitou Kid, and Saguru Hakuba also offer their aid. The group must interpret the intricate hints and capture the offender before they can strike once more. The team vows to execute justice promptly, lest they miss their chance.