A guessing contest between four detectives! How will the real mystery end? The setting is a mansion in the American South in the mid-20th century. One night, four detectives came from England, invited by Sir Moonstone, who loved mysteries. However, shortly after the banquet, the owner of the mansion, Lord Moonstone, is found dead. Was his death a suicide or killing someone else? If it is the latter, who is the culprit? The detective competition begins now! Please tag along with White Raven, Red Die and enjoy the full-scale mystery by Kyun Yasuda and Megumi Landscape.

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