A client asked Mori Kogoro to locate his girlfriend who drove off in his car after a quarrel. The client said he needed a file left in the urgently. When they tracked the car down to the place where the client and his girlfriend first met, they found her dead inside the car.

Mori, Ran, and Conan are at a cafe when they run into Takagi who is aiming to pick up girls. Meanwhile, he finds Sato there doing the same. After a tense date with two strangers, Conan realizes from the conversation that a boy home alone is in danger. When they arrive at their house, the boy has been kidnapped. The kidnapper leaves an email demanding money.