In the 13th year of the Republic of China, there was a night watchman in Yancheng named Hu Fan. Night watchman is a mysterious and ancient profession. In addition to patrolling and reporting time, he is also responsible for dealing with evil spirits that appear in the middle of the night. Recently, there have been frequent murders and disappearances in Yancheng. The police station is helpless, so they go to find Hu Fan, who knows magic, to help. Hu Fan and others follow the clues and find that someone is killing people in broad daylight to sacrifice in order to prolong life...