An unassuming middle-aged accountant learns he has only weeks to live. Rather than tell everyone, Martin determines to learn the three pages of a Bach adagio for piano he'd abandoned as a child. That accomplished, he performs the piece for his wife and friends, completing his life and thanking those who brightened it along the way.

Martin, un quinquagénaire discret, apprend qu’il ne lui reste que quelques semaines à vivre. Il décide de garder son secret et de prendre sa revanche sur une blessure ancienne. Ce sont les trois pages d’une partition de Bach qui lui permettront d’illuminer, du bout du tunnel, toute son existence.