The death of Satou's last partner haunts her when she is put up against the same bomber. The bomber likes to place bombs around the city. Some bombs will display the location of an even bigger bomb if left for the last three seconds, this resulted in the death of Satou's partner in the past. After following clues placed by the bomber, Takagi and Conan are trapped in an elevator, where they await the bomb's clue to the location of an even bigger bomb. Conan disarms the bomb before the last second as he has already figured out the last part of the code. He stops the bomber and he is captured.

During a break in the filming, the star was discovered with his throat slit, with Ruri over the body and her hands bloody. No murder weapon could be found. The immediate suspects were members of the cast, including Ruri and the Nagumo father-son. As the murder took place in the jurisdiction of Shizuoka Prefecture, Inspector Sango Yokomizo arrived to take charge of the investigation. Kogoro and Conan worked hard to find the clues. When Conan finally figured out the solution, he realized he had used up his only tranquilizer dart earlier, and had to resort to nudging Kogoro towards the truth.