The Underworld franchise, which began in 2003, revolves around the eternal conflict between vampires and werewolves. The series follows the story of Selene (Kate Beckinsale), a vampire warrior, as she battles against the Lycans (werewolves) and other supernatural creatures. The franchise has expanded to include multiple sequels, including Underworld: Evolution, Underworld: Rise of the Lycans, and Underworld: Awakening.