On a rainy night in the south of the Yangtze River, the concubine Su Wanqing was destroyed because her father had evidence of Prime Minister Li Chongshan's rebellion. She fled three thousand miles with her account book to Fengsha City in Mobei.
Xiao Che, a dandy from the border town, appears to be a prodigal son who is addicted to gambling and romance, but in fact he is the owner of the "Qingfeng Tower" of the intelligence organization. He is responsible for the blood feud of his father who was killed by Li Chongshan ten years ago. An accidental rescue intertwined the fates of the two masked avengers.
From testing each other to trusting each other in life and death, they learn to trust each other in the pursuit and save each other in desperate situations. When he was fleeing in the desert, she shielded him from the knife; at the front line, he defended her to the death. Confrontation in the Golden Palace brought down the powerful prime minister; ten years of defense in the border city kept the clouds clear.
When the feud was over and the court was in trouble again, they chose to put aside their fame and wealth, escape, open a school in Fengsha City, restart border trade, and turn the lights of swords into fireworks in the market.
This is a story about revenge and protection, but also a story about how two lonely souls meet, fall in love and achieve each other in troubled times. From a runaway girl to a chivalrous bookseller, from a dandy to a border town guardian, they spent ten years proving that true chivalry is not in the world, but in the world; the best love is not to live and die together, but to live in peace and quiet for years to come.
——"We live in the same quilt and die in the same cave. I will guard this world with you."
