When a man is found brutally murdered, Arch and Fitz suspect it is the work of “The Abstract Killer”, a serial killer who plagued Saint-Pierre long ago and was believed to be dead.

A hit and run victim causes Fitz to confront his undercover past, and when his ex-partner unexpectedly appears, she joins him and Arch in a race against time to stop a money heist.

When a diver mysteriously drowns, Arch and Fitz are drawn into a world of shipwrecks and plundering, leading them to wonder if the infamous waterway Mouth of Hell has claimed yet another victim.

A world-famous violinist and convicted predator dies while performing at his father's funeral, propelling Fitz and Arch into a search for his killer among mourners and those protesting his presence.

Our coroner Natasha is at the heart of the inquiry into her brother's recent murder. Arch and Fitz question how the man, who was reported dead over a year ago, re-appeared.

A corpse in Fitz's motel room leads him and Arch to a sophisticated international car theft ring with ties to Fitz's landlady Marguerite, and forces them to work with SPMP's latest asset: Gallagher.

When a Newfoundland teenager with a rare blood disorder disappears during a field trip to Saint-Pierre, Arch and Fitz race to determine if it's a parental abduction or something far more nefarious.

When a man dies on the eve of his high school reunion, Fitz and Arch seek help from one of his graduating classmates, Renuf. The trio investigate his friends and discover a tragedy buried in the past.

We are transported to a speakeasy in full-swing at Veda's bar until a dead body is discovered. Arch and Fitz's murder investigation takes them down a Prohibition path of bootlegging and smuggling.

Patty and Prefect Diard are trapped on a bomb-rigged plane as Fitz and Arch race against a ticking clock trying to discover who set the device, and how they can disarm it before it's too late.

It seems The Abstract Killer is back! Arch and Fitz rely on psychologist Dr. Fouchard's serial killer expertise as they investigate another gruesome murder and rush to save one of their own.

Two murders are part of a larger conspiracy of betrayal, gunrunning and shifting alliances. As Gallagher's empire is fracturing, Arch and Fitz must face down a deeper threat stalking Saint-Pierre.