Moonbyul is a very famous solo artist in her 12th year of career.

Suddenly a woman accuses her of bullying during their school days.

The person affirms that the artist did something on a specific school festival date 14 years before and Moonbyul can't defend herself because she would have to expose the person who was with her.

Solar, a multi-talented singer and actress, watches the news and struggles between her animosity towards her former schoolmate and the necessity to speak the truth.