Sarah Macmillan always puts her family first, but as she ages, she can't quite stretch her arms wide enough to hold on to everyone: her career-minded and inattentive younger sister, Glennie; their grandparents, who are slowly fading; or the late-in-life pregnancy Sarah desperately wanted. But it's her tumultuous relationship with Glennie that gives Sarah the greatest worry. She'd always believed that their relationship was foundational, even unbreakable. Though blessed with a happy marriage to Al, whose compassion and humor she admires, Sarah grows increasingly bitter about Glennie's absences, until one decision forces them all to decide what family means, and who family is. Narrated by the chorus of their three voices, this elegantly told and deeply moving novel examines the pull of tradition, the power of legacies, and the fertile but fragile ground that is family, the first geography to shape our hearts.