Northern Xinjiang is at war, and Xiao Ce rushes to Mogu Mountain alone to save his uncle Xiao Shiyuan who is trapped in the northwest and is poisoned by a strange poison. He writes hundreds of autographed letters, but in the end he fails to mobilize the peerless strategist Liu Shangzi.
When he was at a loss, his baby brother Su Yan went to the fairy mountain alone, relying on old bonds to persuade Liu Shang to come out of the mountain. No one knew that Liu Sheng had a secret admiration for Su Yan when he was young, but the girl was so full of heart that she only cared about her cousin's great cause of the Western Expedition, and did not notice the hidden feelings at all.
There are many obstacles when leaving the mountain: Liu Sheng, who is bound by his master's engagement contract, wants to find Song Jingshu, the orphan of General Song who died in the battle, and protect him for the rest of his life. Xiao Ce traveled through thousands of miles of refugee flows, and unexpectedly found Song Jingshu, who was blind, suffering from panic, and everyone believed that she was dying soon.
On one side is the sweetheart who can't get it, and on the other side is the guilty and frail Zhonglie orphan girl. Liu Sheng is in a dilemma and only promises to wait for Jingshu's condition to stabilize before joining the army on the western expedition.
Internal disasters suddenly arose, and the court collapsed: the late emperor suddenly died, the ninth prince disappeared mysteriously, the Taifu poisoned the prince and put him under house arrest, and wanted Luo Zhi to support the second prince to usurp the throne on charges of treason. Outside, there are Huns cavalry pressing down on the territory, and his uncle is in danger. Inside, there are powerful ministers usurping the country, and there is a lack of capable people under his command. Xiao Ce is trapped on all sides. In order to speed up the pace of the Western Expedition, Xiao Ce sent Song Jingshu to the general's mansion to recuperate. Xiao Ce and Liu Zhang returned home triumphantly, but the Ninth Prince cleverly plotted to separate them. Liu Zhang and Xiao Ce pushed the boat along, pretending to be forced to marry in front of others, but secretly they got what they wanted, marrying first and falling in love later, but Su Yan and Jing Shu were still kept in the dark...
