When the death of his mother brings Nathan Appleby and his vivacious young wife Charlotte back to the family estate, they must turn the farm's fortunes around or risk ruin, and the devastation of the local community. Though the farm and its future demand their attention, when a vulnerable teenage girl is brought to Nathan, seemingly possessed by a terrifying spirit, he cannot leave her to suffer.

When a boy is disturbed by terrifying visions, Nathan finds himself drawn into another case. Charlie's nightmarish hallucinations lead him into increasingly dangerous situations and Nathan must find a way to help him, before his imaginary friends do some serious harm. But Nathan's belief in rationality is rocked by a growing sense of unease, as he starts to experience his own mysterious visions.

Charlie's death leaves Nathan struggling with unanswerable questions, and rakes up his grief over the death of his son. But it's harvest time and Charlotte needs everyone to pull together to get the harvest in - the farm's future rests on the flowing fields of wheat. Yet when a series of freak occurrences threaten the crop, Peter, a disturbed young villager is blamed and Nathan must step in.

A desperate Nathan tries to contact Clarity's spirit. Was her message a blessing or a curse? Though recent events have made Nathan doubt everything he once believed, he's convinced he can get to the bottom of these mysteries. But his growing fascination with spirits is driving him away from Charlotte.

Nathan's increasing obsession with the spirits haunting Shepzoy is taking its toll on Charlotte and the farm. And his attempts to involve Harriet in his experiments infuriate the Dennings. Will he risk all his relationships to pursue the truth?

Shepzoy is a changed place after the horrifying events of All Hallows Eve. Nathan's desperate attempts to contact Gabriel have left him on the edge of madness, and Charlotte is struggling to hold their marriage and the farm together. The harder she tries to save Nathan, the further he pushes her away. Could Nathan finally unravel the mystery of the woman with the book of light?