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.

Thirteen years after her three-year-old son disappeared into the wilderness of Wyoming, Daisy Tucker returns to the scene of the crime to confront the demons of her past and to find her runaway daughter, the twin sister of her missing son.