On holiday with family and her adoring fiancé, Jed, Emily couldn't be happier. But overnight, the idyllic trip turns into a waking nightmare when one of the group is found dead in what appears to be a terrible accident. The devastated party returns to London to cope with their loss while trying to resume their normal lives. But new revelations shed a shocking light on the holiday tragedy and set Emily on a perilous journey to discover the truth about what happened. Soon a terrifying series of threats and lies bring her face to face with the dark truths at the heart of her family - and into life-threatening danger...