What is the movie Buffy vampire slayer about?

The movie Buffy the Vampire Slayer is about a teenage girl named Buffy Summers who discovers that she is the Chosen One, a vampire slayer who is destined to fight and destroy vampires. After moving to Sunnydale, California, Buffy enrolls at Sunnydale High School and meets her Watcher, Rupert Giles, who helps her train and hone her supernatural abilities. Along with her friends Willow Rosenberg and Xander Harris, Buffy battles vampires and other supernatural creatures while trying to maintain a normal teenage life. The movie explores themes of identity, friendship, and the struggle between good and evil.