the main theme of the movie is that vikings have come to slaughter native americans and the man that ends up saving the natives is in fact the son of a viking so the vikings are coming after him and the natives
nonstop graphic violence including throat-cutting and beheadings all shown onscreen with blood flowing from the wounds
the beginning of the film Sunfire goes into a cave, and 100s of dead corpses are shown graphically...then a flashback is shown with savage vikings murdering the natives in cold blood.