This story is about four couples living on Nantucket.The four couples lives intertwine constantly and they always support each other, even though they have their differences. One of the couples, Greg and Tess, decide to sail to the Vineyard to celebrate their anniversary. When their boat is found capsized and they're found dead, each of the other members of The Castaways harbors feelings of guilt, because of secrets they've kept, and grief over the loss of their friends. They all wonder if it was an accident or if something else happened.

While the premise of the story was interesting, I really didn't connect or feel any compassion for most of the characters. For a bunch of friends who were supposedly very close, they certainly didn't mind lying to one another or cheating with one of their friend's spouses. I realize that the characters were written as real human beings in that we are all flawed, but I just didn't find it at all believable. I kept reading just to find out what had happened to Tess and Greg.

Not my favorite book by this author.