Jean is a romantic revolutionary who still enjoys the comforts of a bourgeois life with his wife, Annie. She’s a retired psychologist who laments not seeing enough of her children and grandchildren. Albert is slipping into dementia, while his spirited American wife Jeanne—a former university lecturer—faces cancer but insists she’s cured, even as she shops for a vivid pink coffin. Nearby, a widower named Claude lives as a veteran womanizer who keeps his appetite up even after a heart attack and lonely days at home.
When the five friends witness the dulling effects of retirement on Claude’s surroundings, Jean proposes that they all move into the same house to support one another. The idea unsettles Annie, who loves order and independence, yet the plan grows into reality as they all agree to make the shared space their new home. Enter Dirk, a German ethnology student hired to guide Albert’s care by walking the dog and later to help as life’s changes press in. Dirk also reshapes his thesis to focus on France’s aging population, turning his studies toward the very people he now lives with.
Annie also dreams of a pool on her property, hoping it will become a gathering place for her grandchildren and a place for joy to linger. Meanwhile, Jeanne becomes frustrated by Albert’s worsening memory, especially as he forgets that he is living with friends rather than returning to his old house. Doctors tell Albert that Jeanne’s cancer has resurfaced and is getting worse, adding a new layer of tension to the group’s fragile balance.
A quiet flirtation forms between Jeanne and Dirk as she offers him advice about love and living fully. She memories that she once had a lover but remains friends with him, and she tells Albert she plans to walk the dog with him—only for the moment to devolve into confusion when he forgets who Dirk is and why he’s there. A small domestic accident follows—the bath overflows and ruins Annie’s treasured furniture, yet Albert cannot recall why his wife is upset, leaving a gulf of unspoken hurts in his wake.
As time passes, Albert also helps Dirk rummage through old trunks, uncovering items that reveal Claude’s long-guarded secret: an affair with both Annie and Jeanne from forty years earlier. The revelation rocks the group until Jean confronts Claude during dinner beside the unfinished pool and threatens him with a knife. The truth lands hard on Jeanne, who faints when she learns that Claude had also been unfaithful to Annie. That night, the friends drift toward reconciliation even as grief weighs heavily on Jeanne.
The next morning brings a quiet, sorrowful turn: Jeanne dies, leaving behind a bright pink coffin. In a final, poignant gesture, the survivors place their champagne glasses atop her coffin as she’s laid to rest, and the pool is finally filled, signaling a last attempt at normalcy. Annie’s grandchildren begin to spend time with their grandmother and Jean, offering a small beacon of living memory in the wake of loss.
Yet life remains unsettled. Claude discovers Dirk with a new part-time caregiver—a girl Jeanne had hired who matches Dirk’s tastes—raising another wrinkle in this aging circle. Before they can raise a toast to the new arrangement, Albert wanders in, still convinced that Jeanne is alive. The film closes on a quiet, melancholic note as the friends and Dirk wander the streets calling Jeanne’s name, the weight of memory and time hanging heavy in the air.
