Location: Songxue Villa - a European-style building built in a deep mountain hot spring zone, surrounded by mountains, with only a winding mountain road leading to the outside world. After heavy snow closes the mountain in November every year, the villa is isolated from the outside world and cannot be reopened until April of the following year.
Time: From November 17th to 21st, three secret room murders occurred within five days.
Special setting: The owner of the villa, Lu Songyuan, lost his wife three years ago. Since then, he has invited seven guests related to his wife to stay here every year on his death anniversary. This is the third and final year.
