When a briefcase containing surveillance files revealing the targets of CSIS investigations and their informants is stolen from a supervisor's car, the entire intelligence agency's existence is threatened.

Mary recruits an outsider in order to get surveillance on her wire-room mole, Lee. If she can't turn Lee, she'll have to burn her unit to the ground and start from scratch. In the meantime Mary keeps expanding her overall intel network by recruiting a well know money launderer, Singh. If he wants to stay out of jail, he has to become an informer. Reardon's own money laundering operation is getting closer; an ATM scam to wash the tonnes of cash he is sitting on. He's also taking on new clients, supplying marijuana to a Vietnamese gang. Ted's ally in CSIS, the director Mary is being groomed to replace, is Roger Deakins. Deakins wants to do whatever it takes to keep Mary out of his job, and he and Ted agree to contact an American counterpart in the DEA about a US operation to entrap Reardon. An unknown hit man also tries to take Reardon out, but he is stopped at the last minute by an alert Michael.

Reardon puts up his shipping company as collateral in order to secure a loan to purchase the bank. Reardon's stateside distributor, Alex Morgan, is caught up in the DEA sting. Mary is told her investigation of Royden must go black. Mary sets Katarina up with a business front as cover for her sting on Royden. Reardon sets up a fake sting of his own to test Francine's loyalty. Michael tries to get his money back after a business deal sours. Under Mary's direction, Reardon agrees to handle a shipment of arms for Bingham. Royden looks to move to Vancouver in anticipation of taking over the CSIS office. Morgan works with the DEA in trying to get Reardon down south across the border. Mary conflicts with Ottawa over the best way to handle Royden. Dante kidnaps one of the Vietnamese, Johnny, and threatens to torture him in order to find out if Reardon had anything to do with the death of his nephew.

Caught in a DEA sting in Seattle, Reardon tries to give himself up but it triggers a shootout. Although he never fired a shot DEA agent Williams is able to make it look like Reardon was responsible for both fatal shootings. As his partner and brother work out a plan to get him back to Canada. CSIS agent Mary Spalding has to deal with FBI agent Weathers as he hunts down Reardon while she attempts to determine the truth and protect her greatest intelligence asset.

To make matters worse the Disciples realize that in Reardon's absence a power play could be made so Ronnie must try to skillfully manoeuvre around the situation in order to keep them at bay.

Jimmy is facing murder charges, while Mary tries to uncover the truth of what actually happened in Seattle.

Facing imminent extradition and a rogue team of DEA kidnappers, Reardon must decide whether to flee the country. When Mary discovers that Reardon may be able to provide valuable intel on the financial workings of the Blackmire group, she races to convince the Attorney General to keep Reardon in Canada.

When Mary learns of the CIA's interest in Blackmire, she recognizes an opportunity to use Reardon and Julianna and make CSIS a key player in the global intelligence game. A new gang of cutthroat Americans begins to infiltrate the Vancouver crime scene, suggesting the plot to kidnap Reardon is part of a much more sinister play.

Reardon gains the advantage against the Americans when he uncovers their connection to the DEA and unites the other suppliers in a boycott against them. Mary learns that Blackmire is a CIA front, but worries that releasing the information could be risky to her operation and career. Adding to her problems is a volatile Julianna, whose unpredictable behaviour continues to threaten the Blackmire investigation.