Hidden deep within the mountains of eastern Europe stands Blackthorn Castle, a fortress so old that its true origins have been lost to time. For centuries, locals have whispered stories about strange lights in its towers, voices carried by the wind, and people who entered its gates never to return.
When American historian Daniel Mercer receives a mysterious letter informing him that he has inherited the abandoned castle from a distant relative he never knew existed, he travels overseas hoping to uncover the truth about his family's past.
Instead, he discovers something far more terrifying.
The castle is not empty.
Ancient journals hidden within its walls reveal a dark history of disappearances, secret societies, forgotten kings, and a terrible force imprisoned beneath the castle centuries ago.
As violent storms isolate the mountain, Daniel and a small group of strangers become trapped inside. One by one they begin experiencing visions from different periods of the castle's bloody past.
But the visions are not memories.
They are warnings.
Something buried beneath Blackthorn Castle is awakening.
And it has been waiting for Daniel.
For generations.