The peerless swordsmith, Meng Yezi, suffered the calamity of family extermination from the traitor Zhao Han served in the court for casting the famous Hanguang Sword.

The peerless swordsmith, Ming Yze, created the sword of light, but was killed by the traitor Zhao Han who served in court. Twenty years later his son Meng Yang grew up and wants to take revenge for his father. To fulfil his destiny he needs to finish the sword of shadow, but no smith takes up this job. One day Meng Yang and his gang of orphans were hired to escort prince Gong Zido to the palace to ascend the throne.