Neither the Sea Nor the Sand(1972)

Recovering from a failed marriage, Anna Robinson (Susan Hampshire) retreats to the haunting, eerie climes of the Isle of Jersey, where she finds fulfillment in an affair with lighthouse keeper Hugh (Michael Petrovitch). But when sudden death strikes, Anna finds herself inconsolable and longs for the arms of her lover... who unexpectedly returns from the dead, with a few macabre changes awaiting them both.