This is the reasoning comics describing a high school student detective solving many incidents. His name is Shinichi Kudo. The 17 year old changed to a small child's body because of poison by the Black Organization. The Black organization is an international crime organization and its main activity is assassination, trading, and inventing new drugs. The code names of the members are usually named after liquors. For example, Gin, Vodka, and Vermouth. Ai Haibara, who invented the drug Shinichi took, was a member of this organization but when she was locked in handcuffs, she took the same drug Shinichi took, and became a six year-old girl and escaped from them. Her old code name was Sherry.