Yvon nettoie des poussières invisibles, compte pour se rassurer, parle beaucoup, hurle de colère et écrit pour se calmer. Sa retraite est imminente et avant de quitter son logement de fonction, il revisite sa vie de décontamineur dans les centrales nucléaires. Yvon commence à écrire son histoire.
Yvon cleans up invisible dust, counts to reassure himself, talks a lot, screams in anger and writes to calm down. His retirement is imminent and before leaving his official accommodation, he revisits his life as a decontaminator in nuclear power plants. Yvon begins to write his story.