A new US administration has taken office, installing a brash and unconventional CIA director. When the axe falls on the chief of London Station, the agency veteran decides to spy for the Brits --- a betrayal uncovered by his replacement, Artemis Aphrodite Procter. Caught between a turncoat spymaster and a ruthless new boss back at Langley, Procter now must navigate a tense environment as old friends become adversaries and no one knows whom to trust. Adding to the chaos is a new breed of private intelligence agency: a secretive and powerful company run by a reclusive billionaire. When assets begin dying, Procter and her team in London Station must find out who is leaking the sources’ identities --- and why --- before both agencies go blind.

Kamran Esfahani, a dentist living out a dreary existence in Stockholm, agrees to spy for the Mossad after he’s recruited by Arik Glitzman, the chief of a clandestine unit tasked with running targeted assassinations and sabotage inside Iran. At Glitzman’s direction, Kam returns to his native Tehran and opens a dental practice there, using it as a cover for the Israeli intelligence agency. But when he tries to recruit an Iranian widow seeking to avenge the death of her husband at the hands of the Mossad, the operation goes terribly wrong, landing him in prison under the watchful eye of a sadistic officer. And now, after enduring three years of torture in captivity, Kamran Esfahani sits in an interrogation room, preparing to write his final confession. Kam knows it is too late to save himself. But he has managed to keep one secret --- only one --- and he just might be able to save that.

A Russian arrives in Singapore with a secret to sell. When the Russian is killed and Sam Joseph, the CIA officer dispatched for the meet, goes missing, operational chief Artemis Procter is made a scapegoat for the disaster and run out of the service. Months later, Sam appears at Procter’s doorstep with an explosive secret: there is a Russian mole burrowed deep within the highest ranks of the CIA. As Procter and Sam investigate, they arrive at a shortlist of suspects made up of Procter’s closest friends and fiercest enemies. The hunt requires Procter to dredge up her checkered past in the service of the CIA, placing the pair in the sights of a savvy Russian spymaster who will protect Moscow’s mole in Langley at all costs.

CIA officers Sia and Max enter Russia under commercial cover to recruit Vladimir Putin’s moneyman. Sia works for a London law firm that conceals the wealth of the superrich. Max’s family business in Mexico, a CIA front since the 1960s, is a farm that breeds high-end racehorses. They pose as a couple to target Vadim, Putin’s private banker, and his wife, Anna, who --- unbeknownst to the CIA --- is a Russian intelligence officer under deep cover at the bank. As they descend further into a Russian world dripping with luxury and rife with gangland violence, Sia and Max’s only hope may be Anna, who is playing a game of her own.

CIA case officer Sam Joseph is dispatched to Paris to recruit Syrian Palace official Mariam Haddad. The two fall into a forbidden relationship, which supercharges Haddad’s recruitment and creates unspeakable danger when they enter Damascus to find the man responsible for the disappearance of an American spy. But the cat-and-mouse chase for the killer soon leads to a trail of high-profile assassinations and the discovery of a dark secret at the heart of the Syrian regime, bringing the pair under the all-seeing eyes of Assad’s spy catcher, Ali Hassan, and his brother Rustum, the head of the feared Republican Guard.