This is a passionate story set in the Tang Dynasty and focusing on three generations of military generals, including the ancestors and grandsons of the You family. You Jing, a veteran of the Three Dynasties who is over sixty years old, You Xiao, a general in his prime, and You Yan, a young man, have guarded the border for generations with their family and country as their ambitions. From the inheritance of family training in the Chang'an martial arts field, to the warm night chats in the Mobei military camp, to the detailed Tubo work in the snow, and the life-and-death fight at Yingzui Cliff, the three of them fulfilled their responsibilities as generals in the shadow of swords and swords.