Xiao Wu (played by Zhai Wenbin), Mu Fan (played by Wang Yi), Liu Sisi (played by He Dujuan), and Ling Feier (played by Chai Biyun), students from a certain art college, drove to the suburbs and rented a local courtyard. This is an antique but rather gloomy old house. The surrounding residents seem to be afraid of it and hesitate to speak. In the dead of night, the power suddenly went out in the courtyard. The four young men and women were extremely bored and decided to play the legendary taboo game Pen Fairy. But the fearless and ignorant Xiao Wu actually asked about the cause of death of the Pen Fairy, and did not send the Pen Fairy away afterwards. After that, strange things happened one after another, the opera recitation coming from a distance in the middle of the night, the tree full of dead cats, Liu Sisi's terrifying behavior in the middle of the night... All these things disturbed the nerves of young people. Is it this courtyard or the shapeless Pen Fairy that is terrifying, or...