Kessler and Carver hover near death while Gray hunts down Layla's killers. A bloody highway shoot-out with the crime mob 'Ndrangheta has left Major Kessler and Agent Carver fighting for their lives. The Squad is forced to the sidelines, as Special Counsel Louise Tilden investigates the role of ICS in the much-publicized tragedy. Meanwhile, Gray, who has been suspended from duty, sets out to avenge the murders of Layla and his father Dougie.
Agent Bianca LaGarda escorts seventeen year-old Ali Jabir, a Canadian resident with ties to terrorists and just released from Guantanamo Bay, back to Canada. Kessler and ICS enter questionable moral territory as they use Ali as bait to capture notorious terrorist Nasim Mujab, Ali's childhood friend. Slade - assisted by CSIS agent and language expert Khalida Massi - uncovers an impending terrorist attack on Toronto. At the official inquiry into the 'Ndrangheta shoot-out, the future of ICS is at risk.
When wealthy philanthropist Benjamin Herzog is murdered, the prime suspect is his financial advisor Cyrus Church. Church has engineered a massive Ponzi scheme to defraud his investors of billions. Foreign operatives determined to recover stolen funds are also looking for Church. And complicating matters, Church's new trophy wife is Svetlana Karpov, a Russian stripper from Kessler's past. ICS's newest agent, Khalida Massi, finally gets a chance to prove herself in the field.
Now back on active duty, DHS Agent Liz Carver tracks a murder suspect, the notorious white-supremacist Cole Thorpe, to Canada. Kessler assigns Gray to infiltrate Thorpe's British Columbia-based neo-Nazi operation. Carver still blames Gray for the 'Ndrangheta debacle and her own injuries. When Gray learns the neo-Nazis are planning a devastating act of racial terrorism, Carver must work with him to stop it.
Kessler's daughter Zoe helps Yuan Dao, China's star figure skater, escape from the Chinese Secret Service. Dao claims to be a freedom activist who will face torture and execution if returned to China. Having fallen for the skater and his story, Zoe takes Dao to ICS, where Kessler faces political pressure to hand him over to the Chinese. Zoe and Dao escape again, this time from Kessler.
Khali becomes personally involved in the case of Mina Diwan, a strong-willed Indian 18-year-old who arrives in Canada looking for her "runaway groom". Using a false identity, Anwar Singh has married Mina in the Punjab and stolen her family's $50,000 dowry. Unwilling to return to her strict Indian family, Mina seeks out Canadian relatives to sponsor her for citizenship, but they too disapprove of Mina's modern ways. ICS learns that one of Anwar's previous brides is missing and presumed dead. When Mina goes missing, Khali and the Squad must race to save her.
A snuff film is confiscated at the Maine-New Brunswick border, and Carver finds the body of the film's victim Stateside. ICS traces the video back to the vicious biker gang, Satans Guard. Maggie goes to the east coast to see her estranged daughter Kim whose boyfriend, a former member of the gang, is eager to inform on his former associates. Meanwhile, ICS learns of a cross-border serial killer - who has just set his sights on Kim.
Kessler sends Khali and Darnell to Montreal to investigate claims that a celebrated golden Buddha was stolen and illegally imported to Canada. But the protesters - a Buddhist monk and an idealistic school teacher - turn out to be as mysterious as the Buddha's smile. Khali goes undercover to discover their true intentions.
In a Toronto coffee-shop, an African refugee recognizes the brutal Congolese warlord who raped her and enslaved her son. As they struggle to keep the warlord behind bars, ICS uncovers a deadly conspiracy that links coltan smuggling in the Congo to a powerful multinational based in Canada. Hard-nosed politico Jack Hardacre takes over as Minister of Public Safety, and takes a strong dislike to Kessler. And rebuffed by Kessler, Charlotte takes solace elsewhere.
The American President's upcoming visit to Canada has the ICS Squad on full alert. Working with DHS Agent Liz Carver and the Secret Service Advance Team, ICS sifts through hundreds of threats and uncovers an assassination plot by a Lebanese terrorist, working for the Iranian Revolutionary Guard. But as Slade digs deeper, he discovers the trail they've been following is an elaborate electronic smokescreen created by a sophisticated hacker. To make matters worse, an internal security leak means the real assassin is always one step ahead of the Squad.
A kingpin in Mexico's Los Zetas drug cartel is en route to Toronto to meet his new distributors - the ultraviolent street gang, MS-13. Ramon Esteban - the new flame of Kessler's ex-wife Terri - is a Mexican journalist whose articles on Los Zetas have put him on the cartel's hit list. When Kessler, Carver, and Gray attempt to transfer Ramon from Terri's shelter into protective custody, MS-13 launches an all-out attack. Kessler must fight back with an unlikely team of warriors.