He is gentle and refined, deeply loyal, and devoted to his country and its people. She is pure and charming, tender as water, and blessed with exceptional medical skills. By chance, she, disguised as a man, meets him, the crown prince. When his father accuses him unjustly and everyone doubts him, she alone stays quietly by his side, convinced he is not the one who tried to assassinate the Empress Dowager. Who is the most important person in the world? For him, without a doubt, it is her. But as the emperor's legitimate son, he is destined to be unable to marry a woman of such low status. After his mother arranges a marriage for him with a refined young lady from a prominent family, how will he choose his path amid her tender gaze, his half-brother's schemes, his mother's precarious position as empress, and the heavy responsibilities he bears as a prince?