Case Closed Episode One: The Great Detective Turned Small, known as Detective Conan Episode "ONE" - The Great Detective Turned Small (名探偵コナンエピソード"ONE" 小さくなった名探偵) in Japan, is the sixth animated television special of Case Closed. It was broadcast on the Nippon Television Network System on December 9, 2016. The special, whose subtitle is the same as the second chapter of the manga, serves as a retelling of the entire first and part of the second episodes of the original anime series. It has newly added story elements, not seen in those episodes.
Plot
Sherry is seen entering a testing lab as she is working on a suspicious experiment for the Black Organization. As she views some live footage of test subjects on a computer screen, she calls her sister Akemi, telling her to come over, saying she will show her something interesting. A man walks into a bar called "Black Widow" and sits next to Vodka. Gin appears and says the Organization was having a rat problem. He also says the drink they were drinking was called "XYZ", a drink made from rum and lemon juice, which is mentioned to imply an "end". The man tries to flee by getting into his car, but it immediately explodes upon startup.
Ran and Shinichi see Genta, Ayumi and Mitsuhiko playing soccer. Ran questions why Shinichi left soccer, as he explains he wanted to develop the reflexes needed for being a detective and cites Sherlock Holmes whom he wants to emulate. At Sonoko's home, a guest, Takanori Sewa has been receiving threatening letters before his New Year's party.