The contemporary interpretation of le Carre’s espionage drama - and the first TV adaptation of a le Carre novel in more than two decades - follows a former British soldier as he navigates the shadowy recesses of Whitehall and Washington where an alliance operates between the intelligence community and the secret arms trade, infiltrating the inner circle of arms dealer.
Hotel night manager Jonathan Pine receives a plea for help from a well-connected guest. His actions draw him into the world of Richard Roper, a businessman and arms dealer.
On the Mediterranean island of Mallorca, Roper’s life of luxury and calm is shattered. Six months earlier, Burr continues her recruitment of Pine, sending him to Devon to build his cover story.
While he continues to recuperate in Roper’s villa, Pine starts to dig up secrets about the other members of the household. Meanwhile, Burr and Steadman seize on an opportunity to recruit a new asset.
Roper welcomes Pine into his inner circle, leaving Corky out in the cold.
Meanwhile, Burr has concerns for the safety of her source, when she suspects key information has been leaked to the River House.
A suspicious Roper gathers his entourage around him in an attempt to root out the traitor, forcing Pine to play a dangerous game. In London, Burr and Steadman face mounting opposition from Whitehall.