On an otherwise normal day, Étienne, a happily married man and a good father, sees something that stops him dead in his tracks: a gorgeous woman in a billowing red dress. Long after she has left his vision, her memory continues to haunt his mind. He falls instantly in love with her and tries everything to get to know her better. Helping Étienne snare his elusive lady in red are his three bumbling buddies, which all have secret affairs and/or cheat on their wives.

Three young men - Jacques, Pierre, and Michel - share an apartment in Paris, and have many girlfriends and parties. Once, during a party, a friend of Jacques' tells him he has a quite compromising package to deliver, and asks him if he can leave it discreetly at their place. Jacques agrees and, as he works as a steward, flies away for a one-month trip in Japan, telling Pierre and Michel about the package. Then, one of Jacques' former girlfriends drops a baby before their door, making Pierre and Michel believing it is the package they are waiting for. Their lives are then completely changed.

A desperate woman, whose son is on trial for murder, blackmails the judge and kidnaps his wife.

A detective, fresh out of the academy (lowest mark in class), gets the assignment to bodyguard a spoiled rich girl reporter. She's been interviewed on TV and has questioned the virility of a mobster who kidnaps her later.

A woman becomes trapped in the middle of a feud between two men while attempting to free her younger brother from a life of petty crime.

Martin, the illegitimate son of an industrialist and a hairdresser, was sent to live with his wealthy father in the countryside as a young boy. Alice is a musician living with Martin's half-brother in Paris. When Martin shows up at Alice's door after fleeing his father's home under troubled circumstances, their lives become intertwined.

A man alone in an empty house somewhere in the Solagne region of France. Despite the pleasent light of spring, the man is prey to anguished thoughts : a brewing storm, the blood of two children, a face glimpsed behind a windowpane, sleepless nights spent waiting for the dawn. The man is Vincet Delaune, a famous novelist. But he is having a hard time finisshing his latedt book. A stone's throw from his house, two little girls were killed. In spite of Vincent's disgust at the crime, he is irresistably drawn to the little abandoned train station where the bodies of the twins were found...

Having fortuitously discovered a photograph in which Marthe embraces someone unknown, Étienne Dorsay becomes jealous and imagines various stratagems to identify the lover. In the meantime, he and his friends acquire a weekend house for a very low price.

The film follows four families, with different nationalities (French, German, Russian and American) but with the same passion for music, from the 1930s to the 1960s. The various story lines cross each other time and again in different places and times, with their own theme scores that evolve as time passes. The main event in the film is the Second World War, which throws the stories of the four musical families together and mixes their fates. Although all characters are fictional, many of them are loosely based on historical musical icons (Édith Piaf, Josephine Baker, Herbert von Karajan, Glenn Miller, Rudolf Nureyev, etc.) The Boléro dance sequence at the end brings all the threads together.

Two men, fortyish, worn out by their wives, abandon everything to go and live in the back of beyond. There they meet a truculent priest, a boozer, Émile who recalls them to life's simple pleasures. Calm is what they want. But soon their example inspires thousands of disorientated males...