A serial killer who strangles his victims first then stabs them though their wallet to their chest appears in Osaka. Heiji Hattori invites Conan, Ran, and Mouri for a tour in Osaka. While on the tour they meet Kazuha Toyama who has followed them since the beginning to "Keep an eye on Heiji from Ran". Later, their a body is dropped onto the car, the third victim of the same serial killer.