Sam is broken-hearted when she hears her favourite pony Mulberry is going to be sold. But Mulberry has decided to be very fussy about the home she goes to and sets about causing some serious mischief! Sam is the only rider who can really talk to Mulberry, and the only one prepared to listen. They want to stay together but is their special bond strong enough to persuade Sam's mum to buy the naughtiest pony at Meadow Vale Stables? A funny, heart-warming story about one girl and her VERY naughty pony.