When Nathan Appleby (Colin Morgan, quot;Merlinquot;, quot;The Fallquot;), a pioneering psychologist, inherits Shepzoy House in a beautiful but isolated Somerset valley, he decides to make a new life for himself and his adored wife, Charlotte (Charlotte Spencer, quot;Les Miserablesquot;). But soon the idyll is compromised by strange and disturbing occurrences that all seem to inexplicably swirl around the increasingly troubled Nathan. Is he being haunted? Why? And by whom? The answers will shatter every belief he's ever held and threaten everything and everyone he has ever loved.