The film talked about a teacher helped his students how to be a good person through the power of songs.
Fifty years after the main story takes place, Pierre Morhange, a conductor performing in the United States, is informed that his mother has died before a concert. After the performance, he returns to his home in France for her funeral. An old friend named Pépinot arrives at his door with a diary: it belonged to their teacher, Clément Mathieu, and they
But Clément Mathieu tries to reach his boys and build trust and true order through music. He teached them to sing, and formed a choir. He grouped the boys into their voice types
In 1949, Clément Mathieu, a failed musician and composer, arrives at "Bottom of the Pond" (or "Rock Bottom"), a French boarding school for "difficult" boys, to work as a supervisor.