Back in her native village, Céline discovers a skeleton in her uncle's orchard; Alex is in charge of the investigation that is causing a stir in the Applegrove community.

Céline wants to reopen the investigation into the murder of her cousin, Véronique Jolicoeur; Alex continues his investigation into the death of Marie-Thérèse at the abbey.

The body of Father Sebastian, ruler of the Abbey, is found riddled with crossbow arrows; Céline and Alex inspect the crime scene which is located in the cave of Frère Jacques very close to the place where Véronique was killed.

Alex believes the abbot's killer wanted to send a message; Martin finds clues; Céline studies the file of the investigation into Véronique's murder and makes disturbing discoveries about Damien.

Celine and Alex confront Damien; Celine's mother arrives with new secrets; Leopold makes disturbing confessions about his family's past.

Céline comes up against resistance from Simon and McNeil, who are rather stingy with information; Alex pushes Johnny against a wall.

Celine and Alex grow closer to the killer; the Jolicoeurs suspect a family member; everyone's certainties are collapsing.