Police Captain Michele Varin (Josiane Balasko) is dreading the coming leap year because February 29 is the day her young son died. While battling insomnia and grief, Michele buries herself in her latest case: the hanging death of a woman in the forest. At first, all signs say suicide. But as Michele and her colleague Sylvain (Éric Caravaca) investigate, she begins to suspect foul play -- why are there so many scars on the woman's back? Reality and fantasy intermix as Michele's obsession grows.