This novel is the story of Jack, a man shaken by an accident in his thirties. In his fifties, when he has staked everything on his career and distance to forget, several events - a night in the Causses, a beautiful encounter, a visit to a gallery, a dream, and numerous walks around Mont Valérien - put him back on the path to the past. During a group therapy course, he finally understands what haunts him so much, and what he was unwilling or unable to see.