Three years ago, Earl, a reclusive old hunter, accidentally took in Garmr — a hellhound entrusted to him by Hela, the goddess of the underworld. Hela sternly warned Earl never to break the collar chain that seals Garmr's malevolent power.
Yet a poaching ring led by Dale covets Garmr's premium pelt. They violently assault both Earl and Garmr, and after forcibly abducting the hound, they pry off its collar. With the seal undone, Garmr finally unleashes its terrifying power and exacts a bloody vengeance upon the poaching gang.