In the dead of night, Kate receives a phone call. Police have recovered her sister Anya's clothes and personal belongings at the poolside of a remote hideaway in Mexico - a place she had no idea Anya would be. Anya was last seen getting into a vehicle with a local diving instructor but now he's missing too. Their relationship has been complicated ever since a devastating tragedy blew their family apart, but Kate cannot believe Anya would willingly travel somewhere so isolated with a man she barely knows ...would she? In a race against time, Kate must fight to find her little sister before it's too late. Haunting, emotional and laced with psychological suspense, Little Sister will stay with you long after you have turned the last page.