Synopsis

A mysterious criminal syndicate, Red Venus, operates out of Yokohama, orchestrating a wide range of illegal activities. To stop them, the Kanagawa Prefectural Police form an elite Special Investigations Division – but just as they close in, the team is trapped and exposed to a secret gas that transforms them into children.
 
With only a rookie detective still in adult form, the team must continue their mission while posing as elementary school students. As they investigate a new murder linked to Red Venus, they struggle to stay one step ahead – only to be outmaneuvered once again at the moment of capture.
 
Can the child-transformed detectives bring Red Venus to justice? Their unlikely battle has only just begun.