What if you are going to audition to enter one of the most popular schools in your country? The school is the proud of the music industry in your country! Almost everyone who graduated there became famous. You successfully pasted the first two rounds of the compition when you were finally in the finals. Now you have to compete against the best boy band "B2ST". You pasted as solo artist, just like Soyu, Bora and Dasom. The principal told the four of to debut as a girl group. We didn't mind since we became great friends at the auditions. We decided to call ourselves Sistar, because we are like sisters to each other and we want to become stars!!! Who would win, and what would happen to Sistar and B2ST when they meet?