 In the episode, Buffy's friend Xander and four classmates are possessed by animal spirits, causing them to act increasingly like predators.Buffy and her Sunnydale High classmates are on a field trip to the zoo.A gang of four bullies named Kyle, Tor, Rhonda and Heidi taunts and terrorizes other students, and when one boy, Lance Lincoln, does not have the courage to tell Principal Flutie what they have done to him, they "reward" him by taking him with them to the Hyena House even though it is under quarantine.