A story of aspiring artist who try to 'make it' in the cut throat K-pop industry. After witnessing her twin sister Haeyeon's death, Juyeon had a long list of failures in her music career- Her chances of debut were held back and cancelled every time, her title song was 'stolen' and was given to a popular girl group in her agency, "Yayaya", and she was struggling to 'make it' in a harsh music scene where only kpop idols take the spotlight. When Yayaya betrays their agency CEO, he turns to Juyeon and offers her a chance to start a new group. So she decides to re-assemble her old band 'Butterfly Effect' for one last shot. Starring Hallyu star Hong Soo-ah and former K-pop idol Yoon Sung-mo.