Jen Dunne is forty-two and getting married for the second time, but that doesn’t mean she can’t go all out for her bachelorette weekend. She’s booked three days of super-exclusive luxury accommodation on a remote Scottish island for herself and six other women. There’s Jen’s tennis coach and a fellow tennis-playing fashionista; a famous pop star and that pop star’s estranged ex-bandmate; plus Jen’s future sister-in-law and the sister of her first husband. The helicopter won’t be back for seventy-hours and they have the island all to themselves—or so they think. As the cocktails flow, old grudges begin to emerge and tempers to fray. Then one of the women goes missing. The others receive a threatening message urging one of them to confess a terrible secret. But whose secret is it? Each woman has a darkness in her past she’s reluctant to admit. But they’ll all have to come clean if they want to make it off the island alive.