In every generation there is a chosen one. She alone will stand against the vampires, the demons and the forces of darkness. She is the slayer. Nocturnal creatures lurk in every shadow.
Werewolves prowl under a full moon.
Curses, spells, incantations, ghosts, mummies and myriad monsters replace new clothes and makeup as primary concerns of adolescence. Her inhuman strength allows her to fight and destroy demons, vampires, zombies and other undead threats. But Buffy doesn't kill every beast she encounters. His reciprocal affection prompts him to help her slaughter others of his kind. But after the two have sex, he turns on her, becoming her mortal foe.