When ace high school detective Jimmy Kudo is fed a mysterious substance by a pair of nefarious men in black--poof! He is physically transformed 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.

A serial killer is targeting female police officers. Can traffic cops Yumi and Miike solve the case before they become the next victims? Then Conan and Harley take on a literal cold case, stopping the Kaito Kid from stealing a pearl frozen in a block of ice. And Serena's boyfriend gets a gig as a stuntman--only to become a potential suspect when an actor is killed on set!