简介：What do you do when your best friend is a rat named Halvorsen and everybody else thinks rats are the worst creatures in the World? Svein and his mate Dan are all by themselves until the new girl in class, Melissa, suggests that they can compete in the great pet competition with their rats. During the competition Halvorsen runs off, and the newspapers write that both the school and the hosptal will have to close down because of rat invasion...
