Dr. Y/N Park, a skilled OB/GYN, meets powerful CEO Kim Taehyung and his pregnant fiancée, Mina, for what should be a routine appointment. Taehyung reveals he doubts the baby is his because the pregnancy timeline doesn’t match the time he was away in Paris. Under Y/N’s calm questioning, Mina confesses she cheated during their engagement, shattering Taehyung’s trust and ending their wedding on the spot. As he walks away heartbroken, Y/N realizes this painful moment may be the beginning of something much bigger between them.