Douglas Island sits off the coast of New York State, its imposing cliffs warning away visitors. Still, Finn Douglas has big plans for his inheritance and the rambling manor house that dominates the landscape. He has a vision to turn the island into a resort getaway for overworked city dwellers. But when the broken body of his business partner is found at the base of the rocky escarpment, he fears it wasn't an accident. Special Agent Craig Frasier agrees to help his cousin Finn by investigating and, with psychologist Kieran Finnegan at his side, heads to the island. As Craig and Kieran delve into the history of the Douglas estate, they discover that the property comes complete with strange lore and a blood-soaked past. Something evil seems to be lurking in the caverns that run beneath the stony ground. Is there something on the island that someone is willing to kill to protect?

When his cousin's business partner is found dead on an island he inherited, Special Agent Craig Frasier agrees to investigate with psychologist Kieran Finnegan and they discover that the property comes with strange lore and a blood-soaked past. Finn Douglas has big plans for his inheritance and the rambling manor house that dominates the landscape on Douglas Island off the coast of New York State. He has a vision to turn the island into a resort getaway-- until the broken body of his business partner is found at the base of the rocky escarpment. Special Agent Craig Frasier agrees to help his cousin Finn by investigating and, with psychologist Kieran Finnegan at his side, heads to the island. They discover the Douglas estate comes complete with strange lore and a blood-soaked past. Is there something on the island that someone is willing to kill to protect? -- adapted from jacket