Love is in the air as Conan and company face the most dangerous time of the year: Valentine's Day! Detective Sato of the Metropolitan Police has reluctantly agreed to an arranged marriage - unless her partner Takagi can work up the nerve to confess his feelings for her. But first he's got to catch a convenience store stickup artist who looks completely different to every witness! Can a phone call from Jimmy Kudo help him crack the case before he loses the girl? 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.