Lin Yu, a young man from Anyuan Town in the northwest, lost his parents due to the massacre of the Hu clan's Guli Tu tribe. He went into exile with his father's bow and vowed revenge. On the way, he met Zhang Meng, Su Jin, Su Qingyuan and other allies, joined the army, and got involved in complex disputes. They not only have to fight against the Hu cavalry, but also expose the conspiracy of the traitors and collaborators such as Li Daozong and the second prince Xiao Jing in the court. They have experienced dangerous events such as the fierce battle at Yunmen Pass, Luo Jing's conspiracy, and the exploration of the Xuankong Temple. They have protected their homeland in the blood and fire, and fulfilled their oath of paying with blood and protecting the country and the people.