Shen Yuan, the legitimate daughter of the Marquis of Zhenbei, has been married to Pei Sichen, the Prince Regent, for three full years. She has restrained her sharp nature, laid aside the paintbrush that had accompanied her since childhood and the pride of a marquis's legitimate daughter, and devoted herself to caring for her husband within the prince's secluded residence, preparing his tea, adding layers to his clothing, and looking after him with all her heart. She believed that even cold iron could be warmed with enough tenderness, and that one day she would finally melt her cold-faced husband's heart. But when his casually spoken words, 'a temporary expedient,' shattered all her hopes, she finally saw the truth: their three years of warmth and companionship had merely been a disguise behind which he weighed his own interests.