A year ago composer Ben Shadeland traveled to the Sorrows, a reportedly haunted island off the California coast, to find inspiration for a horror movie music score. Instead, he found madness, murder, and an ancient evil. His family barely survived the nightmare, and Ben swore he’d never return to the island or its accursed castle.

Now Ben’s infant daughter has been kidnapped and Ben is convinced that the malevolent creature that lives in the catacombs beneath Castle Blackwood is responsible. Ben joins three federal agents, a sultry medium, and others in an attempt to save his daughter. But what awaits them is far worse than they ever imagined. The creature – an ancient god named Gabriel – has grown more powerful than ever. It has summoned unspeakable monsters to the island – both human and supernatural. And Gabriel won’t rest until he has his revenge.