Cha Se Eum used to be a violinist, but she is now a conductor of an orchestra. She has pursued her career boldly and with passion. She is now in a position where others are envious. What others don't know is that Cha Se Eum carries a secret. That secret will shake her life.

Meanwhile, mysterious cases take place within her orchestra. Cha Se Eum looks into the cases and approaches the truth surrounding her.