The Cat in the Hat returns and while he leaves Thing One and Thing Two at home, he does bring along Little Cat A nested inside his hat. Little Cat A doffs his hat to reveal Little Cat B, who in turn reveals C, and so on down to the microscopic Little Cat Z. Together they try to get rid of a pink ring that has spread from the bathtub to the dress, to the wall, into some shoes, and finally out onto the snow where they work to get rid of it.