Lin Xiao, an impoverished illustrator, was mistaken for a master of exorcism in the hidden world by the noble lady Ye Mingzhen because he rented a "haunted house". No matter how much he denied it, Ye Mingzhen firmly believed it and kept coming to ask for help with "supernatural incidents". Lin Xiao was forced to play the role of a fake master, using scientific knowledge and random luck to "exorcise evil spirits", causing countless ridiculous mistakes. However, the calm scrutiny of Ye Mingzhen's husband Shen Yan and the ensuing troubles made Lin Xiao deeply trapped in the character of "Master" and unable to extricate himself. How should this absurd misunderstanding end?