Celine and Alexandre must solve the murder of a woman who was found inside the "wall."

Celine and Alexandre make progress with the investigation.

Celine is now interested in looking into the murder of young Gregoire three years prior.

Celine believes that multiple murders are connected.

Celine begins to understand the killer: he murders people who are already victims.

A new disappearance worries the police: Dave doesn’t show up for work.

Celine and Alex uncover the identity of the man Justine calls “my Asian.”

Celine sees the pattern behind the murders. She soon realizes her daughter is in danger.