明朝太谷县发生离奇命案，捕快杜兴顺藤摸瓜，找到了记忆只能延续一个时辰的陆轩，并查到陆轩与当地富商魏虎之间的杀妻仇恨。杜兴深入调查，两年前陆轩和亡妻流月之间的动人爱情浮出水面，陆轩的身份也变得扑朔迷离……

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.