In the second episode of the series, Buffy (Sarah Michelle Gellar) and friends Xander Harris (Nicholas Brendon), Willow Rosenberg (Alyson Hannigan), and Watcher Rupert Giles (Anthony Stewart Head) band together to stop a group of vampires from fulfilling an ancient prophecy called "The Harvest." The Harvest will allow Luke (Brian Thompson), a vampire supernaturally connected to The Master (Mark Metcalf) -- a very old, powerful, and angry vampire -- to feed on humans and thereby give him strength. The Master, viewers learn, was imprisoned in catacombs underneath Sunnydale 60 years earlier by an earthquake while attempting to open the Hellmouth, and is trapped underground until The Harvest is complete. When Luke sends some vampires out for food, they subsequently capture Xander's buddy Jesse and use him as bait to lure Buffy into a trap. Buffy, who now understands her destiny to be the Slayer, dutifully chases after Jesse. Buffy and Xander find Jesse in the catacombs only to realize that he has already been turned into a vampire. Meanwhile, Luke and his vampires are attacking all the club-going teens at The Bronze to fulfill The Harvest prophecy. Buffy and her cohorts come to the rescue just in time to stop them, during which Xander accidentally kills Jesse. Most of the vampires (including Luke) are killed, but Darla (Julie Benz), a vampire who figures heavily in future episodes, gets away. Originally aired on March 10, 1996, "The Harvest" is the second half of the two-part pilot episode.
by Matt Collar synopsis