On the 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.
Hotel 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.
With the arms in transit, Pine takes an escalating series of risks to protect his cover and expose Roper. In London, Burr and Steadman face mounting opposition from Whitehall.