In 1161, Wanyan Liang, emperor of the Jurchen Jin Dynasty, invades the Southern Song Dynasty. Owing to the harsh recruitment policy and the Jin’s cruelty, people in the Central Plain suffer greatly. Xin Qiji, aged 21, takes up his sword to fight against the Jin army to later join the voluntary army led by Geng Jing, winning victory after victory. In 1162, aiming to expel invaders, Xin Qiji is trying to persuade the Song Emperor to drive the Jurchens out of the north. After his mission, he finds the commander Geng Jing killed by a traitor. Facing with Wanyan Basu’s army of 50,000 soldiers, what course will Xin Qiji and his 50 loyal subordinates follow?