A thirty-something teacher drifts through her life in Paris, raising a daughter on her own, lonely in spite of a new boyfriend. And then one night at a friend's tepid New Year's Eve party, Sarah enters the scene like a tornado—a talented young violinist, she is loud, vivacious, appealingly unkempt in a world where everyone seems preoccupied with being "just so." Thus begins an intense relationship, tender and violent, that will upend both women's lives.