闭俗情侣与玩咖辣妹们进行性爱训练的故事

　　讲述的是受害者林宥贞的丈夫李英勋（宋清晨 饰）与嫌疑人金俊成的妻子郑多妍（柳善 饰）在最后一场判决前隐藏着对彼此的怀疑为找出真相而携手合作的故事。

　　Assigned by the professor, 5 senior university students were invited to the old mansion belongs to ML.Salukjit, an old elite who welcomes them with her weird attitude. Before the decision to leave or stay has been made, ML.Salukjit terrifies them and reveals her demonic power.

　　A team of influencer bloggers decides to hold a ritual at the mansion of the "black countess". A fan of the supernatural, she disappeared without a trace after she was offered to play a game that was supposed to take her to another dimension. By evoking the spirit of the Countess, bloggers let otherworldly forces into the world. The one who can bring the demons back will survive.