In the Sui Dynasty, wars continued on the border. The war king Ling Chengyi was old and unable to fight. The eldest son, Ling Jingran, was only 15 years old. He had been familiar with the art of war since he was a child and had great ambitions. He longed to be like his father, galloping on the battlefield and protecting his country. In both the government and the public, no one believed that a young man could take on such an important task, and they all questioned him.
