Avalon, Caitlin and Trace Dupont-Roymont race to collect the most recyclable paper for the Mac-Mass Trash-a-thon. As the competition heats up, Avalon must choose between winning and her friendship with Trace. It does look like "nice girls finish last." So Avalon becomes the ultimate mean girl. She’s tough, ruthless, and dressed all in black. But the meaner Avalon tries to be, the more she helps people by accident. Mean Avalon ends up with more friends and more recyclable paper than she ever dreamed. Meanwhile, Dave and Eli try to build up some good Karma by cleaning up their neighbor lawns. But no one warned Eli about the dangers of killer weeds, elephant dung and Caitlin’s Mom.