At the beginning of the founding of the People's Republic of China, the ancient land of China was full of joy, but behind the joy there was still a cold undercurrent. In Yuzhou, Sichuan Province, Bai Jingzhai, the bandit leader who once dominated the world, was executed by the People's Government, and the rumors that the old house where he once lived was haunted became more and more fierce. Long Fei, eleven young people from Beijing, worked as a clerk in the local archives in Yuzhou, and the dormitory of the archives was the old house of Zibai Jingzhai. Because everyone was afraid of ghosts, Long Fei had to live in the dormitory alone, but encountered many strange and supernatural events one after another. Soon, a murder occurred in the archives, and the criminal police captain Xiao Ke entered the archives to investigate. In the process, Xiao Ke and Long Fei not only sensed the strangeness in themselves, but also accidentally learned the secret of a spy organization called "Plum Blossom Party"... This film is adapted from Zhang Baorui's novel "Plum Blossom Party".