Soon after Buffy's first day as Sunnydale High Guidance Counselor, the gang meets a young woman, Nancy, who's dog was eaten by a large creature living in the sewer. Spike offers his assistance in tracking down the monster, but the gang and Buffy are still a little uneasy with him being around. The gang soon discover the cause behind the monster is an old, estranged friend; who is relishing in her return to form. Meanwhile, Willow has mixed emotions as she prepares to leave England and return to Sunnydale.
Buffy Summer's journey as the Vampire Slayer begins when she moves to Sunnydale, a small Californian town that, unbeknownst to most residents, sits atop a Hellmouth - a portal to supernatural forces. She is discovered by Rupert Giles, the school librarian and her Watcher, whose role is to guide and train her as the Slayer. Alongside Giles, Buffy forms an eclectic group of friends, her "Scooby Gang", including Willow Rosenberg, a shy but highly intelligent witch; Xander Harris, Buffy's best friend and comic relief; and Cordelia Chase, a popular girl who becomes a reluctant ally.
Buffy's relationships with those around her, particularly romantic entanglements, are a major focus of the series. Her most notable love interests are Angel, a vampire with a soul, and Spike, who, despite being a villain, develops a complex and evolving bond with Buffy. The complexities of her relationships, particularly her love life, highlight the emotional weight of Buffy's duties as the Slayer and her desire for connection, love, and a sense of normalcy.