Can Detective Conan crack the case...while trapped in a kid's body?

Jimmy Kudo, the son of a world-renowned mystery writer, is a high school detective who has cracked the most baffling of cases. One day while on a date with his childhood friend Rachel Moore, Jimmy observes a pair of men in black involved in some shady business. The men capture Jimmy and give him a poisonous substance to rub out their witness. But instead of killing him, it turns him into a little kid Jimmy takes on the pseudonym Conan Edogawa and continues to solve all the difficult cases that come his way. All the while, he's looking for the men in black and the mysterious organization they're with in order to find a cure for his miniature malady.

While playing hide and seek, the Junior Detective League finds someone they weren't looking for Conan is sure the kids have stumbled on a kidnapping, but how can he prove it? Then a pretend house of horrors becomes the site of a real death. And while Conan is out sick, the Junior Detective League has to stop a crime with nothing more than a deck of cards