A poignant family drama and ghost story. Maggie Johnson awakes in 2019 from a nightmare in which she has been reliving the death by drowning of her sister Ellie and nephew Tristan in 1994. An accident involving Opal Graham, a friend and colleague at the time of the tragedy, and the strange behaviour of Maggie's four-year-old granddaughter Emily, helped by clairvoyant Amy Rae, align to reveal the truth of what happened. Finally, the survivors of that tragedy learn to leave the past behind and move on with lives that had been frozen by feelings of guilt and responsibility.