It's just not fair! Ruby's family won't let her have a pet. Well, any decent pets, anyway. Her dad's got this awful cat allergy and her mum thinks it's cruel to leave a dog alone in the house all day. Ruby is furious - but determined.
Then she meets Horatio, one of the kittens belonging to Yasmin's neighbour. It's love at first sight, and Ruby starts making plans for the arrival of the new secret family member . . .