O Hye Won is 40 years old and have finally reached the position of planning director for Seohan College of Music where her husband works. Her job entails trying to keep the CEO, the Chairman and his wife happy even though they all have different needs that are often mutually exclusive. One day at a music recital a stranger touches the pretuned piano sending everyone and everything into confusion. However, this stranger turns out to be a young genius pianist named Lee Seon Jae. Hye Won's husband decides to take this man under his wings, only it turns out that Seon Jae has fallen head over heels for Hye Won and the two start an illicit affair. Will the two choose love and risk everything?