Having escaped years of imprisonment, vampire warrioress Selene finds herself in a changed world where humans have discovered the existence of both Vampire and Lycan clans and are conducting an all-out war to eradicate both immortal species. Now Selene must battle the humans and a frightening new breed of super Lycans to ensure the death dealers' survival.

A prequel to the first two Underworld films, this fantasy explains the origins of the feud between the Vampires and the Lycans. Aided by his secret love, Sonja, courageous Lucian leads the Lycans in battle against brutal Vampire king Viktor. Determined to break the king's enslavement of his people, Lucian faces off against the Death Dealer army in a bid for Lycan independence.

Vampire death dealer Selene fends off brutal attacks from both the Lycan clan and the Vampire faction that betrayed her. With her only allies, David and his father Thomas, she must stop the eternal war between Lycans and Vampires, even if it means she has to make the ultimate sacrifice.