The castaways

From the outside, the close-knit circle of friends calling themselves 'the Castaways' share an idyllic lifestyle on the charming island of Nantucket, blessed with money, children, beauty and love. But when Tess and Greg are killed in a tragic boating accident, orphaning their seven-year-old twins, it sends devastating shockwaves through the rest of the group. As the friends grieve, the truth behind their relationships gradually begins to emerge in a chain of staggering revelations. And for the first time they are forced to ask the hardest of questions. Can you live without the person who made you whole? And how do you mourn for a secret lover and a relationship nobody knew existed?