Returning for a final visit to the Martha's Vineyard beach house where they were most happy in childhood, three sisters struggle with family memories and discover astonishing truths in a cache of old letters that compels a journey to their ancestral Ireland.

Mike Leonard wanted to give his parents the ultimate family reunion. And so, one February morning, three generations of Leonards set out on their journey under the dazzling Arizona sky. In the course of their humorous, often poignant cross-country tour, from the desert Southwest to the New England coastline, the Leonards reminisce about their loves, their losses, and their rich and heartwarming (and sometimes heartbreaking) lives, while encountering...