The serie "Buffy, the Vampire Slayer"

Each generation there is a chosen one. A girl destined to defend humanity against the demons, the vampires, and the forces of darkness. She is The Slayer. After a rough initiation into Slayerhood, Buffy, leaves Los Angeles under a cloud of suspicion and relocates to Sunnydale, a seemingly easygoing suburban California community. But peace and quiet are quick to fade as Buffy discovers that Sunnydale actually rests on a Hellmouth - a site of mystical convergence for demonic activity. And so the fight continues, and Buffy's days of slaying are far from over.