Returning to her hometown of Queensbury following a police blunder with dramatic consequences, investigator Marianne Desbiens must solve a murder upon her arrival.

Detective Sergeants Marianne Desbiens, Charles Carignan and Rubina Duquette investigate the suspicious death of the daughter of Nellie and Régis Larkin, an influential businessman in the region. What they thought was a simple accident sends the investigators on the trail of a hate crime.

In this final season, we find Detective Sergeant Marianne Desbiens and her partner Charles Carignan investigating new mysterious disappearances.