In "Case Closed Movie 05: Countdown to Heaven," Conan Edogawa, the Detective Boys, and Professor Hiroshi Agasa head to the Nishitamashi Twin Towers. There they encounter Ran Mouri, her friend Sonoko Suzuki, and Ran's father Kogorou, who are attending the towers' grand opening ceremony. The group decides to take part in an exclusive tour of the building.
During the opening preparations, three violent murders occur, apparently connected to a mysterious Porsche 356A. As Conan and the others probe the incidents, an explosion erupts inside the towers, sparking a fast-spreading fire that endangers everyone. Police rush to evacuate the building, but when the elevator breaks down and traps Conan and his companions, they must struggle to protect those around them. With time dwindling, they race against the clock to solve the case and apprehend the culprits.