Also known as: 十二星座館殺人事件
A Call Of Cthulhu TRPG scenario by Daruma Souko.
The players play as 12 so-called “master Detectives", each one themed after a Zodiac, who are commissioned via a mysterious letter to investigate a village in England called "Hameln" where all the residents have disappeared. In the village’s remaining "Zodiac Mansion", all the detectives have to "find the owner" and "solve the incident within the mansion" if they want to escape alive.