I WOULD LOVE some chiming-in from experts on urban history, but I think that a modern stage in city living began when the garret became the penthouse. In other words, when the extreme upstairs of a six- or seven-story building began to be loved for its commanding view of the city, instead of hated as the final end of a serious flight of stairs leading to a low-ceilinged vault, leaking in the rain, freezing in the winter and roasting in summer.

Director/writer Cédric Klapisch, in his new film Paris, takes up his study of the city from where he left off in When the Cat's Away. That film ended with Garance Clavel's Chloé shouting out to her Bastille neighborhood from the top of the July Column--trying to call back everything being lost to redevelopment.

In Paris, Klapisch takes to the heights of the city again, only this time on all sides--Montmartre, the helipad at the Tour Montparnasse, the Eiffel Tower--to watch over a metropolis becoming less recognizable to him every day. There is one more view from a great height--the top floor of a Haussmann-era building on a steep hill in working-class Ménilmontant. There, a former chorus dancer at the Moulin Rouge, Pierre (Romain Duris), is mortally ill with a heart condition. He is the center of a web of people; yes, Paris is another dreaded tag-team movie, but Klapisch insists on informal, glancing links between the people--a democratic caroming off of the locals regardless of class.

Pierre's sister, Élise (Juliette Binoche), a social worker, moves in to nurse Pierre, bringing her brood of charming, fatherless children. The movie pulls away from this ménage to see the neighborhood, just as Pierre watches from his high window because he can't take the stairs with his bad heart.

There's so much ambient talent here that Klapisch finds something interesting in every angle. Binoche's beauty is getting lusher as she ages, a charm that's amplified by deliberate goofiness, like her striptease out of layers of winter clothes. In a smaller role, Karin Viard is as comical as Kristen Wiig, playing a riotously bigoted bakery owner. The back-and-forth teasing that goes on in a street market is the alternative to her arch old-school politeness.

The ace comic actor Fabrice Luchini plays a Sorbonne professor with the culturally significant name of Roland, who is trying to take the liberal view of change. In class, Roland insists that the tensions between past and present energize a city. He maintains a correct, logical view of his own crisis: his urbane denial of grief over the death of his 95-year-old father, whom he just buried in Père Lachaise. He has harshly logical dealings with his brother, an architect helping to build the new Paris.

Roland is undone by temptations: first, to make some money on a TV documentary series on Parisian history. The job means the give and take of "democratization" (the nice way to say "dumbing down"). On the one hand, he gets to introduce viewers to the room where Baudelaire wrote Invitation to the Voyage; on the other hand, Roland has to interact with a costumed actor pretending to be Baudelaire, bowing to the viewer. Perhaps as a coping mechanism, Roland falls for an irresistible student half his age (Mélanie Laurent, a cruel-looking stunner) with predicable consequences.

The ripples widen to the emotional crises of the shoulders rubbed along the way. We see the working life of the street-market fruit peddlers, who at the end of the film are visited by a group of partying, slumming models. One pair starts making love among the beef carcasses. Staging this in a film is the definition of a bad idea that's so bad it somehow comes out at the other end as good, and that's what's meant by the transformative nature of cinema.

Filling up a screen with Paris is always an excellent strategy. Due to the gloaming overcast, it seems like it's the magic hour there 24 hours a day. Klapisch makes this a thoughtful, optimistic study of a city's ever-constant decline and refreshment, through the arrival of new blood and the ebbing of the old. It's a movie that tries to make peace with this passing scene; as Klapisch says, "an ephemeral portrait of an eternal city."

PARIS (R; 130 min.), directed and written by Cédric Klapisch, photographed by Christophe Beaucarne and starring Juliette Binoche and Romain Duris, plays at the Nickelodeon.

Send a letter to the editor about this story.