Détective Surprenant : la fille aux yeux de pierre

Surprenant agrees to help Gingras solve the murder of a man from the Magdalen Islands found dead in Verdun. The investigation leads him to Martine Boudreau, the victim's cousin and ex-partner of Claude "the Baron" Goyette, a patron of the arts who is as influential as he is enigmatic. Surprenant meets the Baron and his entourage as they prepare for the mysterious Mid-Lent masked ball. Asselin reveals information to Surprenant that hits him hard, concerning a joint operation with the Gaspé police station.

The day after Mid-Lent, the Baron is found dead on La Grave. Surprenant and Savoie inform the family of the death while conducting their investigation. They encounter resistance from the victim's relatives, who all seem to be hiding something. In Montreal, Gingras learns that Charlot was a convicted criminal. Carmen makes a compromising discovery. The net is closing in on the Baron's inner circle. Surprenant is convinced that a link connects the two murders.

The disappearance of Rosalie, the mayor's daughter, forces Surprenant to cancel his vacation.

Rosalie is found murdered on the beach in what appears to be a set-up.

Félix and Édouard find themselves in the middle of an armed altercation between Cormier and Roméo.

Gingras orders the arrest of Lapierre, although Surprenant finds this hasty.

Incredulous at Lapierre's arrest, Surprenant continues the investigation alone.

Geneviève and Surprenant discover a theft of medicine which puts them on a trail.