The police (Inspector Megure, Detective Sato, and some others), dressed in Cheetah Delivery uniforms, Kogoro, and Conan are at the Saekis' house, ready to carry out the plan to catch Reina's kidnapper. Before the housekeeper, Suzuko Tanaka, sets out to deliver 100 million yen of ransom to the kidnapper, Conan sneakily places a transmitter on the her sleeve.

While Kogoro and the police detectives continue to investigate the alibis of every family member, Conan and Ran head to Nashikkokan to gather information on Naomi Senda, who they think is suspicious, from her uncle, Kozo Adachi. After a bit of investigation, the three of them realize the truth behind the robbery.