Graham, Heather  
  
  
    Finn Douglas plans to use his inheritance to turn a rambling manor house on New York's Douglas Island into a resort. But when his business partner's broken body is found at a cliff base
 Finn fears it wasn't an accident--and asks his cousin
 Special Agent Craig Frasier
 to investigate. Craig and psychologist Kieran Finnegan delve into the history of the Douglas estate
 discovering the strange lore and blood-soaked past of the island and its caverns. In Kieran and Craig's search for the truth
 one false step could send them plummeting to their own deaths
 and one wrong turn could bring them face-to-face with a killer.