"It was a really dark night era, where people only ever talked about The Fiend with Twenty Faces. The gentleman thief Twenty Faces absolutely made sure to never hurt anybody before being foretold of having their works of art stolen. But one day, Twenty Faces found a new treasure. That treasure was…a rich man's daughter; Chizuko Mikamo was that person."

The Fiend with Twenty Faces' blood has been inherited by the daughter, Chiko!
The adventurous days filled with mysteries and illusions that Chiko and Twenty-Faces interweave, now begins.

The characters in this series have been used with permission from surviving members of the family of Edogawa Rampo, the renowned Japanese detective fiction author who had originally created the fictional characters of Kaijin Nijū Mensō (The Fiend with Twenty Faces) and Kogoro Akechi.

The series starts circa 1953, set in the Shōwa period.

Included one-shot:
Volume 1: Nijuu Mensou no Musume (pilot)