There's a troublemaker on the loose.
Toby is down in the dumps until Andy and Jane promise her a special party to cheer her up. But first they have to get their headmistress's permission. Then Andy has to devote every spare minute to a major term paper. And Gigi "The Worst Person in the World" Norton decides to throw a rival party of her own, with a truly nasty theme.
When Andy's term paper disappears and Toby is the victim of a cruel letter, the girls of 407 realize that someone is out to get them. Who is causing all the trouble? And how much worse can it get?
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