Buffy Summers arrives for her first day at a new school, and already weird things are happening. She investigates a dead body that is found in the girls' locker room, and, with the help of her new friends Willow and Xander, she fights a gang of vampires. Also, she meets Cordelia and her friends, and Giles, her new Watcher, tells her more about her destiny.
Buffy teaches the Potential Slayers a valuable lesson as she faces a final fight with the Uber-vampire. Meanwhile, Giles and Anya enter another dimension to find a demon which holds the answer the defeating The First. What they find out is very disturbing.
Buffy takes the Potentials to a demon bar and then to Spike's crypt, in order to teach them the art of slaying. When Willow casts a spell to seek out the next Potential, the spell leads them to believe that Dawn may be a future slayer.
After Willow and Kennedy share their first kiss, Willow is transformed into Warren, the man she killed last year. When she sets out to find help, she bumps into an old friend. Meanwhile, Buffy searches for answers when Spike's chip causes him great pain, and the gang suspect that Giles may really be The First
Buffy accepts an invitation to dinner from Principal Wood, and the secrets of his past are revealed. Xander impresses a beautiful girl with his knowledge of knots, and she seems to be interested in tying him up. Meanwhile the First contacts Andrew in another attempt to destroy the Potentials, and Giles finds himself tongue-tied with the new Potential, Chao-Ahn.
The Scoobies use a spell to transport Buffy into a shadow world, where she meets the men who created the first slayer. However, in order for her to return home, the gang must find and slay a ferocious demon
Andrew creates a documentary called "Buffy, Slayer of the Vampyres", a record of the current situation in Sunnydale to show to future generations. He manages to capture many important moments, and to annoy almost everyone in the house. But Buffy needs to tear him away from his filmmaking because the Seal of Danzalthar is active and Andrew may hold the key to closing it before it destroys the town.
Faith returns to Sunnydale just as a new villain, Caleb, arrives and sends Buffy a message in the form of a badly beaten Potential. Buffy leads the rest of the girls to Caleb and The First's lair, with devastating consequences.
Buffy has a powerful new weapon, but the gang cannot find any information about the origins of the mysterious scythe. Eventually the Slayer goes herself in search of knowledge, and finds a new ally, an old friend, and great danger.
After killing Caleb, Buffy conceives a plan to defeat the First once and for all. Willow invokes a magic spell that alters the ancient Slayer spell and gives Buffy the allies she needs to fight the Uber-Vamp army. An epic battle ensues and several good friends are lost. At the end, Buffy faces a completely new problem -- one she's glad to have.