Modern web novelist Long Xuezhi falls into the water and transmigrates into the body of a maid in Prince Jing's manor. All she wants is to save enough money to buy her freedom, but her plan to disguise herself and write an erotic story about Prince Jing backfires. The "Ink Fox," Dantai Qingyun, catches her and drags her to Qingshan Hall. She has to scrub his back and touch his old scars, then loses at chess and is made to recite "the kiss beneath the moon." His trials never end. She angrily calls him a "black fox," and he gives her permission to be the only one who can call him that.
The Prince of Yu plots to frame her, a consort poisons someone and pins the blame on her, and three princes fight for power, shaking the kingdoms of the Six States. Using her modern know-how, she solves a grain fraud case and steadies the trade markets. The little maid who once hid from him becomes the one who holds his heart, cherished in the palm of his hand. In the water dungeon, he clutches her and roars, "I was wrong." Amid the flames of war, he promises, "You alone will be my consort." At their wedding, his black robes complement her purple gown, and even their wedding clothes are embroidered with the name "Yunzhi."
Later, with their twins at their knees, he still peels oranges for her beneath the magnolia tree, murmuring, "For the rest of my life, I'll be your black fox alone." Political intrigue wrapped in sweetness, heartbreak followed by a sugar-sweet romance: watch a transmigrated romance novelist tame the powerful ancient-world tyrant!