For centuries, two races have evolved. Hidden deeply within human culture - the aristocratic, sophisticated Vampires, and the brutal, feral Lycans (werewolves). To humanity, their existence is no more than a whisper of a myth. But to each other, they are the lifelong mortal rivals, sworn to wage a secret war until only one race is left standing. In the midst of this ongoing struggle, a Vampire warrior, Selene (Kate Beckinsale), discovers a Lycan plot, a secret that has terrifying repercussions for both tribes - a plot to awaken a new invincible species of predator that combines the strengths of both creatures and the weaknesses of neither.
As the feud between vampires and werewolves escalates to new heights, so too does Underworld Evolution, delivering a veritable feast of bloodthirsty power, forbidden love and sweeping vengeance.
The Underworld saga continues as hunted Vampire Selene (Kate Beckinsale) seeks out Marcus (Tony Curran), king of the Vampires, in the hope of bargaining for her life. Hybrid Michael (Scott Speedman) wants to join Selene in her quest but is unable to trust the werewolf raging uncontrolled inside him, and she refuses his companionship. Their love proves more powerful than genetics, however, when Marcus descends upon Selene, intent on annihilating her. In the battle that ensues, Selena discovers that she has been betrayed by her own family and she sets out to seek her revenge.