Cha Se Eum used to be a violinist, but she is now a conductor. She has pursued her career with courage and passion. She now finds herself in a position that others envy. What others do not know is that Cha Se Eum harbours a secret. That secret will turn her life upside down. Meanwhile, mysterious incidents are occurring within her orchestra. Cha Se Eum investigates these incidents and draws closer to the truth surrounding her.