In present-day London, Michael Walton makes a quiet, curious pilgrimage to reconnect with his extended family, visiting his older cousins Walter and Oliver Page to uncover a piece of their captivating lineage. His question centers on a concealed branch of the family history, focusing on Anne Keyes, the eldest child of Celia and the family’s late patriarch, Sir Alexander. Anne, an actress by trade, carries the weight of a childhood shaped by adoption and secrecy, a fact that pushes Michael to seek out the truth behind her life and fate. As the conversation unfolds, Walter steers the talk toward a pivotal summer in 1939, when the family’s Norfolk estate became a stage for political tension, private loyalties, and dangerous silences.
That summer unfolds around a birthday celebration hosted by Sir Alexander, whose garden table becomes the setting for charged conversations. Anne’s guests include the outspoken MP Hector, a man unabashed in his political opinions, and Lawrence, a more reserved counterpart who becomes entwined with Anne both personally and politically. A quiet, discreet guest, Joseph Balcombe, a government employee, is also present, his presence hinting at secrets rather than simple hospitality. The mood shifts as Hector voices grievances about Britain’s response to the looming threat posed by Nazi Germany, and the dinner routine conceals a deeper undercurrent of distrust and strategic maneuvering.
One afternoon, while rummaging through a shed used for Sir Alexander’s private papers, Anne discovers a set of gramophone records labeled “Foxtrot.” These discs reveal taped conversations and secret communications, and they hint at an arrangement in which Balcombe has access to government documents stored at the estate. The discovery plants a seed of doubt about Balcombe’s role and intentions, even as Sir Alexander promises to have the records removed during an upcoming picnic with relatives.
Two weeks pass, and tragedy strikes: Hector is found dead in a suspected suicide, a blow that throws the family into questions about who knew what and when. Anne’s suspicions about Balcombe intensify, but Sir Alexander cautions restraint and offers to remove the sensitive material. A tense walk through the estate during the picnic leads to a terrifying moment when a nursery and a lane become the stage for a missing baby—the infant Oliver—triggering a frantic search. Though the family returns and the mystery seems momentarily resolved, Balcombe carries out the removal of the records that night, while Anne secretly keeps two of them for herself.
Back in London, the political tension explodes on the airwaves as Parliament is recalled and Britain learns it is at war with Germany. Anne screens the records in private, and a record of Hector pleading with Balcombe to stop harassing him and his family surfaces, further complicating the web of influence around her. The personal life of the actors within this world bleeds into the public sphere, and the enigma deepens when a fellow actor and friend named Gilbert—who has become entangled in the politics of the time—arrives on set thereafter, only to meet a grim fate as a suicide.
As the film’s narrative threads converge, Anne realizes that a supposed misstep in a scene—where a line is altered from “You should listen to me, Jenny” to “You should listen to it again, Anne”—was not a miscue at all, but a signal embedded in the production to alert her to a larger conspiracy. Anne travels back to Norfolk to support her Aunt Elizabeth, and she revisits the second recording, discovering Balcombe’s voice discussing a covert plan to pressure and silence people like Hector. A chilling moment arrives when she hears her brother Ralph’s voice, naming a covert operation with a childhood code word, “Thin Man Dancing,” hinting at a dark lineage of manipulation and complicity.
A party in London becomes the climactic hub where Anne shares the truth with Lawrence, who already senses the depths of their family’s entanglements. A dramatic rendezvous at a suburban veterinary surgery ends in tragedy as Lawrence’s body is found among shelves of euthanised pets, forcing Anne to flee with the crucial recording. She passes the recording to a child, who promises to deliver it to Churchill, but her escape is short-lived. Balcombe intercepts the second recording back at Aunt Elizabeth’s house and reveals that it was intended for Balcombe’s own faction, a confession that tightens the net around Anne and her father.
Sir Alexander ultimately confesses a stark belief: Britain’s survival hinges on an early peace with Germany, a stance that places Anne as the family member who refuses to share his worldview. Deprived of water and left to die, she endures a harsh, chilling abandonment until Maud intervenes, releasing her while the rest of the family remains in the park, where appearance and complicity are maintained in equal measure. The present-day strand returns with a stark revelation: Anne had died in Canada about twenty years earlier, a truth Michael had sensed but waited to hear from those who knew best. Balcombe’s machinations are laid bare as Michael confronts the possibility that the entire story has been steered by a deliberate choice to keep the truth hidden.
The final act ties the past to the present in a quiet, haunting way. Michael leads Oliver and Walter to the park where Anne’s life once intersected with the family’s secrets. A woman—Michael’s mother—drives an elderly woman toward them, and the obvious culmination is revealed: the elderly woman is Anne herself, living in a fragile, lingering memory that Michael chooses to acknowledge aloud. He admits that he knew the truth all along, but he insisted on hearing it from those who carried the memory most closely. The film closes on a restrained, poignant note, with the living family members standing at the edge of memory and truth, choosing to face what happened rather than to hide behind it. The quiet revelation of Anne’s fate folds into the modern world, where the past and present meet in a single, resolved moment.
