Kaitou Kid now knows that the true identities of Edogawa Conan and Fern Northwood are Kudo Shinichi and Hamasaki Yasuko, teenage detectives who had been shrunk by a drug from a mysterious organization. Akiko has to deal with an unwanted romantic relationship, that could put both her and her partner in crime in danger. Sequel to The New Students.

There are two new transfer students. One is the somewhat quiet Hashiba Akiko who has just transferred into Kuroba Kaito's high school class. The second is Fern Northwood who has just moved from America, straight into the classroom of Edogawa Conan. Both are unusual students with peculiar histories that attract both the world's greatest thief and one of the most famous detectives.