Broken heart

A woman drives to a secluded beauty spot on the Somerset coast. CCTV watches her enter but doesn't see her leaving. She is never seen again and no trace of where she went can be found. The woman's sister calls missing persons investigator, David Raker. As Raker tries to find her whereabouts, featuring the worst, he learns that she was recently widowed from a reclusive film director. It seems going through her husband's belongings she found a secret so dark and shocking that it forced her to leave her entire life behind.