The story unfolds in and around London, painting a portrait of a privileged social circle where desire and propriety constantly collide. Antonia Lynch-Gibbon [Lee Remick], the pampered wife of Martin Lynch-Gibbon, openly informs her husband that she is in love with their best friend, Palmer Anderson [Richard Attenborough], a psychiatrist who means to handle the situation with civility by remaining friends with Martin.
Martin Lynch-Gibbon [Ian Holm] tries to keep his secret romance with his mistress Georgie Hands [Jennie Linden] hidden, even as the truth edges closer to the surface. Palmer Anderson [Richard Attenborough] and Antonia navigate a delicate balance, hoping that friendship can weather the storm of their entanglements, even as the romantic web around them grows more complex and unpredictable.
Palmer's sister, Honor Klein [Claire Bloom], is unexpectedly met at a railway station by Martin instead of Palmer, a moment that underscores the cross-pollination of their lives. Honor, who once taught Georgie at Oxford, fills the pair in on Georgie's affair with Martin and then introduces Georgie to Martin's womanizing brother, Alexander Lynch-Gibbon [Clive Revill]. This introduction marks the start of a cascade of liaisons, as family ties entwine with romantic loyalties.
Martin visits his sculptor brother Alexander, who lives in a large suburban villa, where art and appetite mingle behind closed doors. Meanwhile, Georgie works with historic looms in the Royal College of Art, her room looking out over the Albert Memorial, a quiet backdrop to the shifting loyalties that define the group.
The foursome—Martin, Antonia, Palmer, and Georgie—share a posh meal, a dinner that strains under the weight of unspoken truths. Georgie, uneasy with the arrangement, slips away mid-meal, leaving the others to confront the consequences of their choices. Back at home, Honor sits at the dinner table, a poised figure with an unsheathed samurai sword beside her, and she demonstrates a startling skill with a blade that hints at the danger simmering beneath their refined appearances.
Martin confronts Alexander and Georgie in her studio, a confrontation that tightens the knots of jealousy and suspicion. Alexander leaves, and a tense exchange follows as Martin proposes to Georgie, a bold, provocative move that unsettles everyone involved. When he goes home, Antonio and Antonia are in his bed, a moment that underscores the precarious fabric of trust and commitment among this circle. The scene closes on a note of casual conversation that reveals how appearances can mask the raw and unsettled emotions roiling beneath.
