Charlotte moves to Clamburg from Vermont. Vendetta, a mysterious evil girl, terrorizes the city. Charlotte is unaware of evilness, and thinks Vendetta is her best friend.

For Show and Tell, Vendetta releases a monkey fiend, that eats Marion's unicorn toy and throws away Marvin's bananas, but things go awry when Charlotte introduces Buttons, her hamster, to the Giant Kitty.

Charlotte notices that there are no vegetables in the school menu, after Vendetta hears about that, she decides to make some screamy vegetables fiends.