After being discovered snooping around the shady business of a pair of criminals, Jimmy Kudo is given an experimental drug that transforms the teen sleuth to childhood size! Luckily Jimmy retained his intelligence and panache for solving the most difficult of crimes. Not wanting to reveal his true identity, Jimmy adopts the name Conan in honor of the creator of his hero, Sherlock Holmes. As Conan this pint sized detective is able to gather clues that the police and Detective Richard Moore, the bumbling P.I. Conan lives with, are unable to see. Although Conan takes great pleasure in solving crimes, he yearns to uncover the clues behind the "Men in Black" that forced him to take the experimental drug that forever changed his life.