December 2004, Paris. Grégory Lemarchal wins the Star Academy live in front of more than ten million people who communicate with him. Spring 1985, Pierre and Laurence Lemarchal discover that their child is suffering from an incurable disease, cystic fibrosis ... Between the two, the story of a kid unlike any other, the story of a voice, of a presence, of an extra soul, of a constant struggle. Between the two, it is the story of Grégory that is written in the first person. This is "why I live" ...