"Midnight Show" tells the story of the theater manager Lin Mei (played by Fan Meng) and the theater's eldest daughter Zijun (played by Feng Yanyan) who are best friends who can talk about anything. Before Zijun is about to get married, she accidentally discovers that Lin Mei seems to have some unknown relationship with her fiancé Jiajun (played by Deng Xianyu). One day, in the ancient house No. 37 where they work, a highly anticipated puppet show is being performed, and the mysterious puppet possession is about to begin. As the strange scenes of reality interweave with Lin Mei's dreams, the unexpected truth surfaces!