While on a fishing trip near a remote Irish village, two men find more than they expected... Exploring the riverbank, they are astonished to see the river abruptly plunge into a deep chasm. In the abyss stands the remains of an oddly shaped house. Inside the ruins, the men find a strange old manuscript, filled with precise but strange writing.
The journal reveals the story of a man's apparent descent into madness. He chronicles otherworldly visions, trips to other dimensions, and attacks from swine-like creatures. After awakening from one of his visions, the man finds that seemingly nothing has changed. Only then does he realize that the supernatural and horrific events are real.