In this sequel to Underworld, Seline has to defeat the evil vampire Marcus. He is even more evil than Victor, whom she killed in the first movie. Micheal Corbin is back and ever evolving into the first hybrid between the two species, Vampire and Wherewolf. When Marcus is awoken, he goes on a nonstop killing spree until he finds Celine and Michael and kill them both before they can stop him in his quest. His quest is to free his brother William from his prison. Celine will not have any of this of course, she tracks him down and they battle to the death.