¿Grant Campbell owns a successful advertising agency in London's West End. Approaching his fortieth birthday, he takes his wife and four young children on holiday to the Spanish island of Menorca. There, one of his teenage daughters befriends Sara, a precocious 15 year old girl who has a dark and secret past. The meeting starts a cataclysmic chain of events that will shatter the lives of the Campbell family and will see Grant at the centre of an international manhunt as he and Sara try to evade capture from the police and a ruthless gang of Chinese drug smugglers. The question is, who will get to them first?