Buffy is a Slayer, one in a long line of young women chosen for a specific mission: to seek out and destroy vampires, demons, and other forces of darkness. Unlike her predecessors, Buffy establishes a group of supportive friends who aids her in her battles with evil, including Willow, Xander, and Cordelia. Her battles with evil are frequent, since Sunnydale, where Buffy and friends live, sits atop a gateway to the realm of the demons.