Mildred is looking after 'Bonzo', who is Ruby's cyberpet, but forgets to feed it for so long that it dies. During a potion lesson to make the elixir of life, Mildred drops Bonzo into her potion, In an attempt to bring it back to life, which causes the potion to overflow onto the desk and floorboads. They then come to life as trees and destroy the potion laboratory, after which Bonzo goes missing.