A humble Irish farmer decides that it is high time to move that big old stone in his field that has been there seemingly since the dawn of time. This gory horror film, an adaptation from one of noted British-author Clive Barker's short stories, follows what happens next. No sooner does he move the rock when out rushes an enormous, blood-thirsty pagan demon, Rawhead Rex, who immediately goes berserk and begins biting people left and right. Among the bitten is the son of an American professor of history and anthropology. His father immediately begins researching the angry old god and plotting his demise.