Sous forme de lettre au père, Cher Henri... est le portrait d'un homme, Henri Cunillera, disparu sans laisser de traces en 1976. Vingt-sept ans plus tard, son fils devenu réalisateur reprend l'enquête.

“What interests me in filmmaking is getting to know men and women, their stories, faces and voices. Little matter, when it comes down to it, whether they are actors or not, whether it involves documentary or fiction !
So, underlying my project was my love for people, who happen to be "my family”. Alongside, there was a story of fathers and sons (in the plural!), which also happened to be my own, but my fear of narcissism held me back for a long time...
I was, and still remain, fascinated at the extent to which History, Spain at the time of the Civil War and the France of May 1968 can weigh on such an “ordinary” family and influence the course of these humble lives swept along by the century”