1870.Apprentice lighthouseman James Meakes joins two others at the remote offshore rock of Ripsaw Reef - replacement for a keeper whose death there remains unexplained.
Meakes' suspicions grow as he accustoms himself to his new vertical world. He finds clues, obscure messages and signs that a fourth occupant may be sharing the space, slipping unseen between staircases.
With winter approaching, the keepers become isolated utterly from shore. Sea and wind rage against the tower. Danger is part of the life. Death is not uncommon. And yet as the storm builds, the elements pale against a threat more wild and terrifying than any of them could have imagined.
