A man named Ryousuke Oomine threatens Kazuyoshi Onda, the president of a game company, to pay his game designer the money he deserves. During the dispute, Oomine accidentally shoots Onda with a gun and leaves the crime scene. The next day, Ran and Sonoko take Conan out to an ice-cream parlor in the mall. Conan overhears Takagi and a police officer discuss the how a young girl has been kidnapped and held hostage by Oomine. Conan searches for the girl at the parking lot and frees her from Oomine's grasp. However, Oomine captures Conan and uses him as his hostage. While pursued by the police, the two hide in the basement of a warehouse. Conan analyzes Oomine and confirming he is un-armed, attempts to escape. An unknown man however attempts to shoot Conan but is saved by Oomine. Elsewhere Kogoro investigates Oomine's friends and realizes three other people has the motive to kill Onda. Conan realizing there is more to the case then a simple murder, calls Professor Agasa to hide him and Oomine from the police.