In New York City, six-year-old Maisie is caught in the middle of a bitter custody battle between her self-absorbed parents—an aging rock singer mother and a distracted art dealer father. As both quickly marry new partners to strengthen their legal standing, Maisie is shuttled back and forth in an endless game of emotional point-scoring. Yet amid the chaos and upheaval, Maisie begins to find true comfort and affection in her new step-parents.