Journalist Joe Oakes makes a living exposing supernatural hoaxes. A born sceptic, he believes that 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 happened to their leader, Pastor Malachi Dove? Most important, why will no-one discuss the strange apparition seen wandering the beaches of Pig Island.