The accurately-named Red Cat and Blue Cat share a house and mutual antagonism. But each also secretly wishes that they could have some of the other's signature traits--Blue Cat is a smartypuss who's good at opening cans and the fridge; Red Cat can bounce across rooftops and zoom up the drapes. After two attempts to change to the other's color don't pan out, each instructs the other in the art of being the cat that they are not. And though Blue Cat and Red Cat try very hard to be a different sort of cat, the real change happens when they become friends. Until they spot Yellow Cat...who sings...really, really well...and the friends consider whether a new hue might be the way to go!