On what he treats as his 29th and final birthday, James—a young man grappling with terminal cancer—sets out on a last hiking trip with his three closest friends: Davy, Bill, and Miles. Their destination is James's favorite retreat, Barafundle Bay, tucked along the rugged Pembrokeshire coast, a place that promises quiet moments and the chance to savor what remains of life.
Davy is the steady heartbeat of the group—kind, loyal, and endlessly responsible. He has spent long weeks unemployed, but has been a constant caregiver, helping James's family shoulder the burden of illness. He moves with a practical calm, arranging supplies, navigating rough terrain, and offering a quiet resilience that keeps the trio tethered to reality even as emotions run high. Bill, by contrast, is the loud, boisterous spirit of the circle—fun-loving and upbeat, someone who leans into humor to blunt the sting of pain. Everyone hopes at last that he might finally break free from an oppressive relationship, even as that dream remains uncertain. Miles, who lately rejoined the fold after a stretch away, is a handsome, sharp-witted businessman. He carries the weight of a complicated past: the son of a celebrated novelist who succumbed to cancer, and a friendship with James that has always been tinged with both affection and rivalry, especially as they both chase the same literary ambitions.
As the journey unfolds across the isolated coastline, James’s strength wanes. He sits in a specialized cart, dependent on frequent morphine and other medications to ease relentless pain. He welcomes small pleasures and childlike joys along the way, a contrast to the urgency of his terminal diagnosis. Yet beneath his lighthearted surface lies a growing bitterness—the sense that his life may end before he has had a chance to do something meaningful with it. The trip becomes a test for their friendships: practical jokes give way to sharper, more piercing conversations as James rages against what he sees as complacency and mediocrity in the lives of those around him.
The group endures a string of misadventures and setbacks: the rugged path tests their patience, supplies are lost, and even the cart that carries James becomes a casualty of the voyage. As tensions flare, James directs his barbed observations at each friend in turn, pushing them to confront uncomfortable truths about their choices and the futures they actually want. Davy feels a sting of embarrassment at the accusations, while Bill reveals that his girlfriend is pregnant and that, despite their doubts, he cannot walk away. Miles responds with brutal honesty about James himself, and the two of them expose hidden loyalties and long-buried secrets: James discovers a manuscript Miles wrote years earlier and had never shared, a collision of envy and admiration that casts Miles in a complicated light; Miles, for his part, has kept a distance from James as he struggles with his own guilt, since he has been intimate with James's married sister, a revelation that shakes the foundations of trust within the circle.
On the night they finally reach Barafundle Bay, James shares a stark truth about the trip’s purpose: he intends to drown himself in the sea to escape the escalating agony of his illness. He asks his friends to permit it and to tell his family and the authorities that he and his companions woke up to find his body in the water. The others are horrified, and their initial instinct is to refuse. Yet mounting pain, the temporary loss of James’s morphine supply, and the fear of what he will endure if they do nothing drive them to reconsider their stance, testing the limits of loyalty under pressure.
The next morning, with the tide and waves bearing witness, James begins to swim out to sea while his friends keep him company. In a final, heartbreaking moment, Miles steps in to help James complete his decision, guiding him toward the water as the shore looks on. He brings James’s body back to shore, leaving the others to grapple with the consequences of a journey that began as a search for meaning and ended in an act that neither fully wanted nor could easily prevent.
