Un soupçon S01 E02 Episode 2

Who is Isabelle? A serial murderer, a liar, a femme fatale or a stay-at-home mother, who, since a young age, has always had to fight to survive? This is what gendarmerie captain Mathilde Delboscq wants to understand, in charge of the investigation into the death of Isabelle's husband, Pascal Bonnot.