6 boys from the same school are best friends and they called themselves the BEAST. One day, they heard about a room that no one is dare to go, the music room on floor 5. They heard some rumors telling them that the one that called for the Midnight Killer, will be killed. YoSeob, who is one of BEAST member is always acting so cool and brave. The BEAST members challenged him to call for the Midnight Killer. And when YoSeob did, his soul will be charged for waking the Midnight Kille