When Meredith Mitchell picks up a hitchhiker on a lonely road outside Bamford one evening, she is left feeling uneasy that the woman asked to be dropped at the beautiful old home of lawyer Andrew Penhallow. The next morning, he is found murdered in the garden. Superintendent Alan Markby, who knew the man as a young boy, is sent to investigate. Andrew Penhallow had some ghosts in his past -- has one come back to claim him?