Brian and Sophie are so bored that they get hooked on the trendy new trading card game that is all the rage at school. Unfortunately, they become so obsessed that they let the house - and themselves - go to wrack and ruin. They even end up stealing and selling Lucy's (or rather the school's) laptop computer to Andy the Freak. Because Sophie and Brian seem prepared to go to any lengths to feed their trading card addiction, Mel and Lucy have to teach them that crime doesn't pay. The only problem is, it looks like it's Mel and Lucy who will end up headed for trouble with the law. Lucy gets detention and Mel almost ends up having to go out with Andy The Freak on a date.