Alex
Jean is a "slow" man, he builds his life around his anxieties, and considers himself unsuited to life in society. He lives with Alex, who is a "fast" man. Passionate about aerodynamics and eurodance, Alex lives fast and asks himself as few questions as possible. One morning, he receives a fast friend, Lou, at their place, while Jean had also planned to receive a slow friend, Caroline.
After meeting at a party, Isaac and Ava spend the night walking in the cold Parisian winter and fall in love without even realizing it. But Ava has to go to Brazil the next day. As he waits for her alone, Isaac learns that Ava's plane has gone missing.
Antoine - a grieving loner - spends his days in a cafe on Place Clichy watching people. Every day, he sees a woman he calls Albertine get out of the subway and go to the movies. Today, he takes it upon himself to talk to her. Thus began Antoine's down-going.