 Sabrina tires of Libby s constant teasing-- which worsens when Sabrina joins a science club-- so she gives the tormentor a taste of the taunting by turning her into a nerd. Meanwhile, Zelda wants Hilda to throw out some very old items. Tired of watching Libby treat people badly, Sabrina decides to give Libby a taste of her own medicine by transforming her into a geek. However, when Libby succeeds in turning her fellow geeks against the entire school, Sabrina must find a way to unite her classmates before the plan backfires.