Since childhood, Zhou Chu, commander of the Xuanjia Army, had lived disguised as a man. After a victorious return to Beizhao, she was ambushed—only to learn the traitor was her sworn brother, Deputy General Xu Han Zhi. Rescued by her former rival Shang Ke Feng, Zhou Chu reclaimed her true identity as a woman and assumed the alias Xue Shi San. She infiltrated Dengying Tower to seek revenge, walking a dangerous line between two men while unraveling the truth in secret.