A man has to ask the agency to Kogoro to find a watch which he has lost in his house. Kogoro refuses the problem, but the young detective and Dr. Agasa offer to help. During the research, is the internal neighbor of the man who is also his creditor. The woman holds in the living room to watch a videotape on television and here died hit by a vase of flowers. The noises coming from the room to suggest an attack. During the investigation, Takagi reveals to Conan that someone has stolen from the police all the documents relating to cases resolved by Kogoro. These documents, however, were returned by mail shortly thereafter. Moreover, Takagi adds that the thief must have struck the same day it happened the questioning of witnesses about the hijacking of the bus, so, think back to Conan asked: Jodie Professor, Dr. Araide and a mysterious man named Shuichi Akai.