Milly and Molly look after Sooty, an injured cat, whilst Molly’s cat, Tom Cat, exhibits strange behaviour. Meanwhile, Molly becomes jealous when Milly is invited to a party but she is excluded. Molly shuns Milly but, through the behaviour of Tom Cat, Molly realises that she is just jealous and that even though Milly is going to the party without her, Milly and Molly are still the best of friends.