Journalist Joe Oakes makes a living exposing supernatural hoaxes. A born skeptic, he believes everything has a rational explanation. But when he visits a secretive religious community on a remote Scottish island, everything he thought he knew is overturned. Questions mount: Why has the community been accused of Satanism? What has happened to their leader, Pastor Malachi Dove? And perhaps most important, why will no one discuss the strange apparition seen wandering the lonely beaches of Pig Island? A confrontation, and its violent and bloody aftermath, is so catastrophic that it forces Oakes to question the nature of evil and whether he might not be responsible for a terrible crime himself.