The Game of Solitaire

The life of Julien Vogel, a psychiatrist, is turned upside down by the death of a teenager he had under treatment. To stand back a bit from things, he decides to take a vacation in the company of his son Matthieu. But why does he choose to go to a lost hamlet where only three houses are still inhabited? When his son gets killed, Julien loses all his bearings and ends up taking up the blame for murdering him, a crime he did not commit, seeking refuge in death.