Joe, a lonely journalist who has devoted her life to an ideal of justice. Beth, a housewife who sacrificed her dreams and ambitions for her family. Agnès, a life coach driven by a desire to surpass herself. Three very different women who are united by the unbreakable bond of sisterhood.

Having grown up in a commune founded by their father, they each have buried dark secrets to rebuild their lives on their own. The discovery of an abandoned baby in their childhood village Sainte-Piété leads the women to reunite after 30 years of silence to try to discover who or what is behind the tragic mystery.