[Chinese Cthulhu + Republic of China + Suspense] Four investigators with no cheating or cheating, all abilities are determined by the dice, a Chinese-style Cthulhu-flavored team-running module. The background of the story is that during the Republic of China, the only son of the Chen family rebelled against the family and investigated the secrets of the family's ancestral home. We are determined to ensure that the logic of the character's behavior in this novel is consistent with the investigator's task personality and professional characteristics. The plot advancement is determined by the success or failure of the character's attributes and skills, but includes unchangeable cutscenes.