Xiao Chengyan, the war king of Dachu, is cold-blooded and cold-blooded, but his position is disrupted by Su Wanqing, a "book boy" sent by the imperial court. This seemingly weak young man is actually a female military counselor who is proficient in the art of war and has a scheming like a god. She disguised herself as a man and entered the camp to clear her father's wrongdoing, but unexpectedly helped Xiao Chengyan break the siege, break up the conspiracy, put down the rebellion, and conquer the battlefield with wisdom; while Xiao Chengyan went from "suspecting and testing" to "silently guarding", wrapping her edge with iron-blooded tenderness. The two have evolved from the superiors and subordinates of "strategist and general" to "each other's only one". The female protagonist uses strategy to defeat her opponent and avenge her injustice, while the male protagonist protects her with deep love and promises her a lifetime. In the end, the world was brought to peace, and they returned to seclusion hand in hand, writing a sweet legend of "strategists at the top and generals at the bottom".