Two sisters, aged 5 and 8, hang out alone at home in the middle of the countryside. Elsa, the youngest, swallows three grains of coarse salt. Judith announces to her that she’s doomed to a death by desiccation, and she only has a few hours to live. The mother returns, behaving ardently and feverishly, and turns the family's destiny upside down.

When Pierre learns that his parents are not his parents, he wants to find out who he is and where he comes from. Raised in nature, Pierre has never been confronted with society. He does not know the codes. He will team up with Anna who will help him in his quest and cross a whole gallery of characters as funny as tender. But during his investigation, Pierre will lose his colors – like a photo that fades.