Set before the Battle of Changsha, this is a story about unsung heroes during a time of warfare and follows a man who learns to fight for a greater cause in his journey to find his father's killer. In order to occupy Changsha, the Japanese resort to using the 'black butler', a strategic agent that has been lurking in China for 15 years to carry out a long-planned deception. Yun Mu Zhi, a member of the underground party of the Communist Party of China, is killed while investigating the "black butler." Without knowing his father's true identity, his son Yun Hong Shen returns to their hometown of Changsha to track down his father's murderer.