3月19日晴科勒探长正在调查一男子在一个面具俱乐部里离奇毙命的真相。他通过警方得到了死者的验尸报告。死者全身没有伤痕，是窒息而死，凶器找不到，死前曾喝进少量的酒精。据调查，面具俱乐部里的会员都戴着面具，就连俱乐部的主人也不知道他的客人是谁，只要客人定期入款进 On March 19, Detective Sunny Koh is investigating the truth about a man who died in a mask club. He obtained the autopsy report of the deceased through the police. The dead body without injuries, suffocation and death, the weapon can not find, died before drinking a small amount of alcohol. According to the survey, masks club members are wearing masks, and even the club owner does not know who his guests, as long as the regular deposit into the guests