At Heathrow Airport, Leonard Burr meets a distressed Rex Goodhew, who reports he has been sidelined by his superiors and that his files on the Roper case have vanished. Burr is furious that Roper’s jet, with Jonathan aboard, has again disappeared from radar surveillance. Goodhew explains he is now under the “parental guidance” (470) of his rival, Geoffrey Darker. Burr informs him that Jonathan successfully obtained all critical details of the arms and drug shipments.

Burr begins calling in favors across Whitehall. At her office, his former colleague Debbie Mullen shows him a top-secret Flagship memo stipulating that all intelligence on the drug ship, the Horacio Enriques (the ship named by Jonathan’s intelligence), must go directly to Darker’s department; she refuses to help. Burr then meets with Nicky Denham, a former ally, who, along with Signals officer Guy Eccles, explains why interdicting the arms ship, the Lombardy, is bureaucratically impossible. They cite jurisdictional issues in Panamanian and Colombian waters, political sensitivities, and the restrictive terms of the Panama Canal Treaty.

Back in his office, Burr learns from Rooke that Sir Anthony Joyston Bradshaw, Roper’s arms procurer, has been skimming money from the deals. Burr spends the night analyzing Bradshaw’s file and confirms with Goodhew that Harry Palfrey, the River House’s legal adviser, has the authority to sign emergency surveillance warrants.

At a Joint Steering Committee meeting, Geoffrey Darker systematically dismantles the case against Roper. He successfully blocks Burr from attending and argues that the operation should be controlled by his agency as it is part of the larger, secret US-UK operation codenamed Flagship. Darker then discredits Burr’s primary source: Marjoram names him as Jonathan Pine, and Darker elaborates, presenting Jonathan as a “psychopathic fantasist” (511) with a fabricated criminal past including theft, drug-running, and murder, rendering his intelligence worthless. Publicly humiliated, Goodhew defends his agent’s integrity but is ignored and leaves the meeting in defeat.

Burr, learning of the disaster, initiates a desperate gambit. He forges a set of official letters addressed to himself, to Goodhew, and to Goodhew’s master, using varied stationery and typewriters to create a fake Flagship dossier. He then summons Harry Palfrey, a known double-agent, to a secure room. Burr physically intimidates Palfrey, accusing him of betraying agents to Darker, and confronts him with the forged file, which convinces Palfrey he is about to be arrested along with his boss. Terrified, Palfrey agrees to sign a secret warrant authorizing the rerouting of all calls made to Darker’s three personal phone numbers to a line controlled by Burr’s team.

In Miami, Deputy Assistant Attorney General Ed Prescott informs DEA agent Joe Strelski that the case against Roper is dead. Prescott cites intelligence from Langley painting Jonathan Pine as a dangerous psychopath, making him an unusable witness and his information unreliable. A furious Strelski recognizes this as a cover story for Operation Flagship, the high-level operation protecting Roper, and realizes he is being silenced. Strelski then receives a call from his colleague Amato, who has learned that Jonathan is being held prisoner on Roper’s yacht, the Iron Pasha. Strelski relays this information to Burr.

Burr drives to the country estate of Sir Anthony Joyston Bradshaw. He bluffs, telling Bradshaw that Darker is under voluntary house arrest pending charges and that he and Roper are next. To prove it, he has Bradshaw call Darker’s personal numbers. The calls are rerouted to Burr’s office, where Rooke and a coerced Harry Palfrey play their parts, confirming the crisis and warning Bradshaw that “the balloon’s gone up” (522). Believing the ruse, a terrified Bradshaw agrees to Burr’s terms: He will call Roper and tell him that in exchange for dropping all charges and giving the ships a free run, Roper must release Jonathan and Jed within the hour. That night, a guilt-ridden Harry Palfrey dies by suicide by jumping in front of a bus, leaving a will naming Goodhew his executor.

Aboard the Iron Pasha, Richard Roper hosts a lavish cruise for his wealthy friends. Jonathan is held in a forward hold, chained, gagged, and systematically tortured by Corkoran, Frisky, and Tabby, who try to find out what he knows and who he has told. Jed is also on the yacht, a virtual prisoner forced to play the role of hostess. Upon her arrival, Roper kept his back to her while reading documents, then spoke with studied unconcern, revealing he knew Jonathan was a spy and suggesting she might be his accomplice.

Jed maintains a facade of normalcy while trying to locate Jonathan and find a way to help him. She deduces he is being held in the security area and can tell by the grim faces of his interrogators—Roper, Corkoran, and Langbourne—when they return from a session.

Meanwhile, Jonathan endures the torture by retreating into his mind, where he holds imaginary conversations with the late Sophie, who becomes his “Secret Sharer” (541). Her memory gives him the strength to remain silent, believing that refusing to speak is his only weapon. He asks to speak to Roper once, only to declare Jed’s innocence, a claim Roper dismisses. As the abuse continues, Jonathan’s refusal to break becomes a source of power, and he secretly conserves his energy, waiting for an opportunity to act.

After receiving Bradshaw’s panicked phone call, Roper becomes tense and silent. He locks Jed in their stateroom while he confers with Corkoran. The yacht changes course. When they return, Roper tells Jed to put on “sensible shoes” (550), and she packs an escape bag.

Meanwhile, Frisky and Tabby enter Jonathan’s cell, telling him his time is up. Feigning unconsciousness, Jonathan allows them to unchain him and carry him to the forward deck, where Roper, Corkoran, and Jed are waiting. With his secretly hoarded strength, Jonathan suddenly attacks his guards, smashing their heads together and knocking them out.

He advances on Roper, who orders Corkoran to shoot him. Jed screams for Jonathan to stop. To end the confrontation, Roper declares “I’m doing a Daniel on her, Pine,” (557) grabs Jed by her hair, and holds Corkoran’s pistol to her temple. Defeated, Jonathan collapses. He and Jed are put into a launch and sent away from the yacht. As they depart, Jed sees Roper standing on the deck, looking like the charming gentleman she first met in Paris.

In a small fishing village in Cornwall, two brothers, Pete and Redfers Hosken, notice that the Lanyon, a cottage that has been vacant for a year, is now occupied. Investigating, they see a man who strongly resembles the previous tenant, Jack Linden, but with a thick beard. They also see a woman and a horse.

When Redfers mentions the sighting to his future mother-in-law, Mrs. Trethewey, she sternly corrects him. She explains that the new residents are a “gentleman from Ireland and his lady” (561) who are starting a new life. Mrs. Trethewey reveals that a “persuasive gentleman from Yorkshire” (561)—Burr—visited from London and spoke to certain locals. She instructs Redfers that the man at the Lanyon is an “innocent stranger,” and that for the sake of the two “precious souls” (561) living there, he is never to mention the resemblance to Jack Linden again.