-The story of three sisters whom everything seems to separate, but who are united by an indestructible bond. Having grown up on a commune founded by their father, Joe, Beth and Agnes have buried dark secrets as they try to rebuild their lives on their own. When a mysterious 911 call leads the police to the discovery of an abandoned baby in their hometown of Sainte-Piété, the three sisters are forced to unite after 30 years of silence to discover who's behind this dark plot.

As Joe, Beth and Agnes try to find a balance in their personal lives, the arrival of a person linked to the commune turns everything upside down. At the same time, the identity of the perpetrators of the plot surrounding the baby's abandonment is revealed and leads to serious consequences for some characters. Once again this season, the past and the present intertwine, unraveling many intrigues and creating new mysteries.