When ace high school detective Jimmy Kudo is fed a mysterious substance by a pair of nefarious men in black--poof! He is physically tranformed into a first grader. Until Jimmy can find a cure for his miniature malady, he takes on the pseudonym Conan Edogawa and continues to solve all the cases that come his way.

 

Usually, Conan's mind is focused on detective work. But when Rachel falls for a handsome young doctor at a crime scene, suddenly the pint-size detective can't concentrate on the case... As Rachel threatens to give up on the perennially unavailable Jimmy Kudo, Conan starts to harbor murderous thoughts of his own... Then the Syndicate returns! At a glittering holiday ball, Conan and Anita face the shady organization that turned them into kids. But the game changes forever when one of them transforms back to the right age!