In the series, 15-year-old Kensuke Hanasaki, a member of the club led by private detective Kogoro Akechi, one day meets a boy named Yoshio Kobayashi.
Manga authors Peach-Pit (Rozen Maiden) provide the original character designs for the series starring boy detecting Yoshio Kobayashi (CV: Daiki Yamashita) and Kensuke Hanasaki (Ryota Oosaka), joined by their former leader and now behind-the-scenes advisor, aged 18 Ryo Inoue (CV: Yuichiro Umehara).
Their encounter gradually leads to a deep fate between Akechi and his rival criminal The Fiend with Twenty Faces.