Red, the boy, in typical childlike fashion, does not take kindly to the fact that the girl, Russel, a newcomer to the house, tries to advise him on the size of the house he should build for himself and for Red, the cat. However, once he has freed her from the gang of children who want to make her their captive, and once Red has freed himself and all the other cats from the cat-catcher's truck, it is agreed that the house must be made bigger. Why? Because now there are not two but three Reds.