Claire is only seven years old when her college-age sister, Alison, disappears on the last night of their family vacation at a resort on the Caribbean island of Saint X. Years later, Claire is living and working in New York City when a brief but fateful encounter brings her together with Clive Richardson, one of the men suspected of murdering her sister. It is a moment that sets Claire on an obsessive pursuit of the truth... For readers of Emma Cline's "The Girls".