I heard that three years ago, a beautiful girl with an extraordinary family background confessed her love to a famous piano prince of Sacred Heart High School, but she was rejected. She couldn't bear the blow and hanged herself in the piano room of Sacred Heart High School at twelve o'clock that night After committing suicide, the piano prince from Sacred Heart High School who played the piano well, comparable to Chopin, disappeared. Three years later, Nuo Yan was lucky enough to hear this story in the study room. After that, she heard the piano sound like heavenly sounds. Met the piano prince, after the magical pen fairy game in the dormitory that night, students continued to be hanged to death? They died one by one, did they commit suicide in frustration, possessed by the pen fairy? Ominous spirits, or intentional murder? Is the prince a man or a ghost? Who is the instigator of all this?