Sam is pony-mad and dreams of being a brilliant rider. But her nerves often get the better of her, even when she discovers that she can actually talk to horses. Mulberry is a beautiful black pony, but she's so grumpy no one wants to ride her. Except for Sam... Can Sam conquer her fear of falling off and ride Mulberry to victory in the Meadow Vale Summer Show? Or will Mulberry's bad behaviour ruin everything for them both?