Surgeon Yun Si died suddenly on the operating table, crossing over in a single lifetime to become Princess Chu. She suffered cold treatment in the prince's manor, being asked to assist the frail secondary consort. After escaping with her medical kit, she punished wicked servants and insisted on a divorce. Healing people and saving lives instead brought framed charges, and trespassing into the forbidden grounds provoked Prince Chu's fury. She only sought to escape and walk far away, never expecting the indifferent prince would eventually regret it in the beginning and bitterly chase his wife back.