Looking for a new apprentice, music professor Kang Joon Hyung discovers Lee Sun Jae who has raw talent and ability. Sending Sun Jae to his wife, Oh Hye Won, for an evaulation, a volatile relationship is about to begin between them.

Hye Won auditions Sun Jae and finds him to be a gifted and thrilling pianist.

Sun Jae prepares for the entrance exam into Seohan University's piano major.

Da Mi appeals to Hye Won to help get Sun Jae released from jail after he nearly assaults a lady.

With Sun Jae staying at their home, Joon Hyung preps him for his audition while Hye Won tries to avoid his advances.

Despite Hye Won trying to maintain a professional relationship with Sun Jae, she still finds herself drawn to him.

Joon Hyung is becoming suspicious of the relationship between Hye Won and Sun Jae which seems closer than it should be.

Hye Won becomes jealous when she sees Sun Jae with Da Mi eating dinner and takes it out on him.

As Hye Won and Sun Jae become closer, she ends up being assigned as his official instructor.

Sun Jae performs for his biggest audition and Hye Won has to deal with her boss being caught for illegal financial activity.

Hye Won tells Sun Jae to not meet or call her for awhile after she receives a text from a man who knows about their secret meeting place.

Joon Hyung tells Hye Won to end her relationship with Sun Jae. Meanwhile, Sun Jae looks into applying for school abroad.

In the midst of her legal trouble, Hye Won tries to clean up her mess with Sun Jae.

Hye Won finds it harder to pretend to have a loving marriage with her husband.

Hye Won tries to gain the upper hand in her legal war against the Chairman and Chairwoman.

Hye Won must make a decision that will affect the next decade of her life.