Gu-ju is once a famous producer who left the music industry after one of her idol group members died of accident. One day, she encounters Yu-jin who was kicked out of an agency called ‘Star Music’ after years of training to be a singer. Gu-ju believes Yu-jin could be a star and produces an idol group called ‘Mr. Children’.The talented group, ‘Mr. Children’, attracts public attention and their fans increase exponentially. Seeing this, ‘Star Music’ uploads the video of Yu-jin when he was a trainee in order to slander Yu-jin. As a result, Gu-ju, Yu-jin, and the members of “Mr. Children” face a hard time.