Middle class student Bob Letellier enters a new world when he meets Alain, a free-thinking rebel who, along with his group of young Parisians, has opted for a life of instant gratification instead of work and commitment. At a party, Bob meets a young woman, Mic, who appears to be just as carefree and cynical as Alain. Mic's only dream is to own a luxury car, and with Bob's help, she manages to find the money to but it. Mic's friend Clo discovers she is pregnant and, not knowing who the father is, she asks Bob to marry her. When they next meet at a party, Bob and Mic deny that ...