Catherine Heathcote (Juliet Stevenson), a high-flying journalist, is putting the finishing touches to a documentary about the case of schoolgirl Alison Carter, who vanished from her home in 1963 and was never seen again. Her film focuses on DI George Bennett, then a young and ambitious detective, who became closely involved with the case. However, Bennett suddenly withdraws his cooperation and Catherine must travel to the place where it all happened to find out why.

Desperate to end the secrets in Scarsdale, Catherine makes a fateful final visit to the village.