Mo Yue devoted her life to studying Chinese medicine. At the age of ninety-eight, as she lay dying, she shed regretful tears over her unfinished Ancient Chinese Medicine Manual. But instead, she transmigrated thousands of years into the past, to the Great Sheng Kingdom, becoming the youngest daughter of a country doctor who wandered from village to village. She had hoped to live a quiet, ordinary life, but one prince held her little hand and breathed on it to warm her; another rubbed his brow in deep thought, determined to hold her in his arms even if they had to take up arms against each other; another stormed away in anger, only to turn back, pull her onto his horse, and willingly wander the world with her. As for the youngest prince, who knows nothing of his duties, she has to exhaust herself guiding him in ruling the realm.