Juliet (Sydney Sweeney) has lived under the halo of her sister Vivian (Madison Iseman) since she was a child. Vivian is more beautiful, more talented, more popular, and admitted to the music school she dreams of. Everyone believes that Vivian has a bright future in music and will eventually succeed. By chance, Juliet picked up a sheet music left behind by a girl who committed suicide. She played the sheet music and was deeply attracted by the weird and beautiful melody. The school is recruiting candidates for concert piano solos, and Vivian is obviously the one with the greatest chance of winning. However, Juliet took this opportunity away from her sister with the sheet music she picked up, which also caused the sisters to turn against each other. After that, Juliet felt that her inner desire was growing, and she wanted to get more.