Kate is having a big birthday party and her mother is making her invite her whole class, including Lizzie, Miranda and Gordo. Lizzie is dead set against going until she finds out cell phones will be given out as party favors. But her mom puts the brakes on her idea of going because there will be no ""acceptable chaperone"" there. Miranda suggests the three of them say they are going to the mall, then sneak out to the party. Lizzie is reluctant to go along with the idea, but she does. Gordo gets his parents' permission to go, but that only frustrates him since his parents think he's such a good boy he couldn't possibly get into trouble. So he tries, rather unsuccessfully, to show he has a dangerous ""dark side."" When Lizzie, Miranda and Gordo arrive at Kate's house the party is ragin': loud music is pumping, Lizzie gets handed over people's heads like a stage diver in a mosh pit, and the supposed ""chaperone,"" Kate's 18-year-old cousin Amy, is making out in the closet! None of their classma