What exactly happened during that rehearsal? Why did the choirmaster harbour so much hatred? F is an amateur musician surrounded by dismal scores and false notes. He falls into the ambush prepared by the world's 'greatest musicians'. However, F cannot remember hitting the wrong note; he's a good singer and absolutely adamant that it wasn't him, however much the choirmaster and his friends insist that it was. Determined to prove his innocence, he discovers that nothing is straightforward anymore, and that life with a beautiful voice is nothing but a sick joke.