The town of Iron Hat, South Dakota, has disappeared and only one eccentric local remembers it ever existed. Investigators hear him out, but decide he's just gone crazy.

When Graves Hill, a town near Leicester, also disappears with only the MP complaining he's missing some constituents, the Black Dragoons-a clandestine military unit dedicated to protecting Great Britain from supernatural threats-investigate.

Soon, the Black Dragoons and their American counterparts are working together. Preacher's Daughter is on the case, but Great Britain may never be the same again...