Three victims who seem to share nothing in common are discovered within locked rooms in the serial locked room murder case. Yusaku's advice was requested by the Metropolitan Police Department, and he was scheduled to solve the case on live TV, but he ends up sick in bed with food poisoning. Yukiko, who was going to disguise herself as him and appear in his place, gets sick as well. Conan hears the doorbell ring and goes to open the door to the Kudo family home to turn down the TV appearance but comes face to face with Yusaku, who should be sick in bed...?! Kudo Yusaku's unrehearsed and unprepared detective show begins!