The best-kept secrets are the deadliest.When a private boarding school pupil drowns in a lake on the grounds, DI Fiona Williams is called in to investigate. Security around the school grounds is tight, making it a closed community.Fiona thinks the death was due to a secret society initiation rite that went wrong, but the school denies the societies exist, and her investigation hits a wall of silence.A second pupil dies, but the silence continues.The school is concerned with its reputation and upholding traditions, the influential parents care only about protecting their children, and the pupils have secrets of their own.Nobody wants Fiona to expose the whole truth.