Meng Yezi's family was exterminated by the traitor Zhao Han for casting the Hanguang Sword. He desperately tried to save his son Meng Yang and left him the Chengying Sword, which had never been created. Meng Yang grew up and attempted to avenge his father twenty years later. Chengying Sword had not yet been cast to compete with Hanguang Sword at the time. The emperor died, and Meng Yang was appointed to escort prince Gong Zidu back to the palace to succeed to the throne by chance. Meng Yang agreed to seek the truth regarding his family's avenge extermination. On the way, however, he met with a terrible mishap...