Divorced private detective Francois Maneri is assigned by his agency to investigate the disappearance of Rachel, a young student who has been missing for six months. After interviewing Rachel's family, friends and classmates, Francois is attacked and injured by an anonymous assailant and becomes reluctant to continue his search. But when Rachel's body is found, Francois is drawn deeper into the investigation as he discovers the dead girl's secret life.

A strange investigation doesn’t erase the regrets of a grieving woman cop. Every four years, the past catches up with her. Every four years this woman is very afraid. Her fear is such that she feels it could kill her because in her dreams reality begins.

Depuis peu Eric Vincent, trentenaire sans histoire, a un fort sentiment de malaise. Est-ce la peur d'avoir un enfant ou celle de voir brutalement resurgir le fantôme d'un père qu'il n'a jamais connu ? Un matin, un inconnu l'appelle pour lui proposer de récupérer les cendres de son père. D'abord réticent, il finit par accepter et se retrouve plongé au coeur d'une machination infernale.