When Internal Affairs thinks there are dirty cops in the department and want to grill Ray, Welsh worries about Ray's cover being blown and not being able to find him. Meanwhile Fraser, sent on the hunt for Ray, joins Ray in wait for a criminal who made Ray the man he became.
Someone attempts to kill Stanley's ex-wife Stella and her date, with Fraser and Stanley saving their lives. She's dating Frank Orsini, an alderman involved in a controversial housing project, with Fraser trying to solve the case while serving as Orsini's bodyguard.
Framed for murder, Ray must stay under arrest at the Canadian consulate while Fraser goes out to hopefully solve the crime before Ray is extradited from there with an aggressive man running for the State's Attorny Office looking to put him away.
One of Kowalski's informants is stabbed to death while a few days earlier a flight attendant in Canada is murdered. Fraser finds the primary suspects have airtight alibis and no obvious ties. Yet Fraser plays a hunch that there is a connection.
While Kowalski is questioning minor criminal Stanley Smith, Fraser discovers a body encased in the wall. It's Guy Rankin, who had a bad history with Francesca and she asks Fraser to find the killer but quietly. The presence of psychotic killer Kuzma and the FBI complicate matters.
Ready to split up and go their separate ways on re-assignments after a bad squabble, Ray and Fraser are drawn into one more case after a man lands on the front of Ray's car dead with a knife in his back and a map carved into his chest, leading the two into a mystery involving gold, pirates, and a ghost ship