Sedemondo (Massimo Girotti) kills his brother and usurps the throne of his Italian kingdom, and then rules without regard for law or justice. An elderly seer warns the wicked king that his actions will result in his ruin, but he continues his dictatorial ways. Meanwhile, Arminio (Elisa Cegani), Sedemondo's nephew, whom he had exiled to the wilderness, grows to become a powerful warrior. Arminio joins forces with Tundra (Rina Morelli), another orphan, and returns to avenge his father's death.