When Rachin departs to accept an award from the board after taking credit for the choir, Mathieu and Maxence suspend classes and take the boys on an outing. While they are out, Mondain returns and sets fire to the school. Mathieu is fired for breaking the rules, even though he saved the boys' lives, and Maxence is suspended. As Mathieu leaves, the boys—forbidden to say goodbye—lock themselves in their classroom, sing and throw farewell messages out of the window on paper planes. Touched, Mathieu walks away, musing about how he has failed and nobody knows of his existence.