The story of "Hell Mayor" tells the story of Luo Yifan (played by Lin Zhexi), a passionate village chief who sees ghosts at 5:20 every evening. After meeting Zhao Nuan (played by Yan Zhenglan), a rookie lawyer who firmly believes that only the law can bring fairness and justice, and Wen Weiren (played by Zheng Renshuo), an elite lawyer who is elegant, warm and romantic, a series of sudden cases began to occur one after another. Along with the conflict and dialectic between "belief in God" and "law", various bizarre suspense cases are waiting to be solved, and the huge secrets hidden between the three people are gradually emerging.