The film tells the story of a bizarre murder case in Taigu County during the Ming Dynasty, where constable Du Xing follows the trail and finds Lu Xuan, whose memory only lasts for one hour, and uncovers a hatred between Lu Xuan and Wei Hu, a wealthy local businessman, for killing his wife. As Du Xing digs deeper into the case, the love between Lu Xuan and his late wife Liu Yue two years ago emerges, and Lu Xuan's identity becomes confusing.