Buffy receives guidance from her Watcher, Rupert Giles (Anthony Stewart Head). Giles, rarely referred to by his first name, is a member of the Watchers' Council, whose job is to train and assist the Slayers. Giles researches the supernatural creatures that Buffy must face, offering insights into their origins and advice on how to kill them.
Buffy is also helped by friends she meets at Sunnydale High: Willow Rosenberg (Alyson Hannigan) and Xander Harris (Nicholas Brendon). Willow is originally a bookish wallflower; she provides a contrast to Buffy's outgoing personality, but shares the social isolation Buffy suffers after becoming a Slayer.
Buffy was another one of my favorite shows that the greedy pigs of capitalism decided to cut because they judged it to not be made of pure gold. I really hate those guys...
It follows the life of a chosen by fate highschool student who gets supernatural strength, speed and agility in order to fight and kill supernatural beings, mainly vampires but she kills other things as well. It is like teen Supernatural with a blonde instead of Sam and Dean. The storyline is pretty good, and it has some interesting twists.
It is an old series and as such some of the effects are way too outdated, some friends discarded the show just because of that, I on the other hand was not affected by it, with the exception of 2-3 episodes that the monsters were so funny that I couldn't stop laughing to keep track of the story XD
Bottomline it is a nice series to pass your time if you like killing supernatural creatures and don't mind some low tech effects, go watch it.