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

Everyone in town is dressing up like it's 1930, but the fun is interrupted when the dolls in Emma Blavatsky's antique dollhouse start depicting strange crimes that soon come true in real life! But when Nancy stakes out the dollhouse, she witnesses a doll version of herself murdered!