Emma loves to visit Grandma Dolly and her animal sanctuary in the summer holidays. At home Emma isnt even allowed a guinea pig. While staying with Dolly Emmas grandmother is asked to take in Mississippi the beloved horse of her friend the wealthy Mr Clipperbush who has passed away. Emma cant believe her luck when Grandma then gives her Mississippi-a horse of her own. But suddenly theres trouble. Mr Clipperbushs long-lost nephew wants the horse back-and will stop at nothing to get his way. What can Emma do? Saving Mississippi means everything . . .