Hugues, in his thirties, is unable to settle down, like a free electron. He turns around Muriel, a young woman who refuses to accept him, finding him too unstable. One day, he meets Florette, another young woman who leads him to an association fighting against evictions. He immediately gets involved and proves to Muriel and to himself that he is capable of commitment. But when it comes to the compromises that building a relationship requires, he squanders his chances, preferring his freedom.