The realm is divided among warlords, and battles rage without end. Xiao Jin, the God of War of Beilin, spends ten years on the battlefield, conquering six kingdoms and securing the northern frontier. But his achievements make the emperor wary, and he becomes embroiled in the monarch's suspicion and the crown prince's machinations. The court deliberately cuts off military pay and supplies to the frontier, leaving 100,000 Black Armored soldiers trapped in a desperate situation.
To save his soldiers, who have shed blood under his command, Xiao Jin is forced to accept a marriage alliance for political gain. Having witnessed his mother's tragic political marriage as a child, he has long since frozen his heart. He sets the terms of their engagement: they are only joining forces to balance power and serve their own interests. There will be no talk of love.
Everyone pities Liu Yue, the legitimate princess of Liujin, believing she is a sacrifice to the chaos of the age, destined to travel to the bitterly cold northern frontier and become a helpless pawn at the mercy of others. No one knows that this eighteen-year-old princess controls cross-border trade routes across the four seas. She is skilled in commerce and political strategy, understands the advantages and motives of others, and single-handedly sustains half of Liujin's trade with nothing but an abacus.
To Liu Yue, this marriage alliance is no hopeless prison. It is the perfect opportunity to enter the game of a chaotic age and find a way to survive. Their marriage contract binds the interests of two countries and sets a contest of wits in motion.
After moving into the cold and imposing Prince Shuo's residence, Liu Yue advances cautiously and plans her moves with care. She puts the household in order, clears the way for border trade, and uses commerce to support the army and replenish its supplies. With her own wealth and ingenuity, she repeatedly unravels court conspiracies and resolves crises on the frontier.
The iron-blooded God of War is cold and unfeeling, covered in old wounds. His merchant princess is clear-eyed and steadfast, with unmatched strategic brilliance. What begins as a transaction of mutual benefit turns into a bond forged side by side each day. Xiao Jin's heart, frozen for years, is finally melted little by little by her, and he gives her all the love and indulgence he can for the rest of his life. In the end, they join hands to bring peace to the realm and stay together through the troubled times.
Theme: In a chaotic age, people struggle for power and test one another's hearts. Bound by a marriage of convenience, the two support and redeem each other amid court intrigue and crises on the frontier. They use commerce to break through their predicament and sincere love to withstand the chaos, ultimately holding fast to their principles amid political scheming and joining hands to bring peace to the land.
