Matthew Macrae has been tending to the lighthouses of Pentland Firth, in northern Scotland, for over thirty years. His son, Rowan, will follow in his footsteps, just like Matthew followed in the footsteps of his father before him. Soon, Matthew will have to share with Rowan the dark secret that their family keeps. The lighthouses must always shine at night because their light does much more than guide ships safely in...it also keeps a terrible evil out. When the storm of the century puts the lighthouses in danger, Rowan finds himself following in his father's footsteps sooner than he thought, where he'll come face to face with the greatest fear he's ever known.