Drama based on the novel by Susan Minot. Overcome by the power of memory, Ann Lord (Vanessa Redgrave) reveals a long-held secret to her concerned daughters; Constance (Natasha Richardson), a content wife and mother, and Nina (Toni Collette), a restless single woman. Both are bedside when Ann calls out for the man she loved more than any other, Harris (Patrick Wilson). While Constance and Nina try to take stock of Ann's life and their own lives, their mother is tended to by a night nurse (Eileen Atkins) as she journeys in her mind back to a summer weekend some 50 years ago, when she was Ann Grant (Claire Danes). As she reflects on a beautiful and life-changing weekend with the one true love of her life, her daughters come to their own understanding about the power of the past and the unbreakable bonds between mothers and daughters, family, and the loves of their lives.