French pastry shop owner Su Tang unexpectedly time-travels, becoming the fallen state princess Zhao Feiluan sent to the Northern Di for a marriage alliance. In a desperate situation, she binds with the "Dessert Queen System," using a Honey House to shake the entire grassland, investigating spies, providing relief for snow disasters, stabilizing tribes, and saving the Khan. Step by step, she transforms from the universally despised "abandoned marriage alliance pawn" into the adopted daughter of the Northern Di Khan and the universally revered "Princess Zhao" across the grassland. Finally, standing shoulder to shoulder with the young emperor Li Yan, she uses sweetness to win the hearts of all under heaven and rebuilds her homeland.