With Conan sick in bed, Haibara and the rest of the Detective Boys investigate when a boy known for playing pranks on people claims that the couple in his house are not his parents and Conan suspects that he's telling the truth.
Conan has to work under pressure when a gunman takes over Kogoro's agency and wants someone to figure out which of his three hostages murdered his sister.
A high school student named Kaito Kuroba discovers that his father's death years earlier is connected to Kaitou Kid, an elusive master thief who suddenly reappears after eight years.
Looking for a client who made an appointment, Conan, Kogoro, Ran and Amuro discover that Kogoro's office has been broken into. They track the burglar to a restroom, where they hear him kill himself with the client tied up in front of him.