The summer after the loss of their spouses, Juliet and Dean meet over their children's sandcastle friendships on a remote beach in the Cayman Islands. Love blooms among the hibiscus. But as they navigate tentative steps out of grief, it becomes clear that neither has come to the island simply for fun in the sun. Mysterious emails from the States, an accident involving Dean's oldest son, and hazy memories from a night most of Rum...