Summer has always loved horses but she never thought she'd be able to learn how to ride them - not with money being so tight at home. Then she discovers the Starlight Stables where she meets a new gang of friends and learns how to ride in return for helping-out with the horses. It's a dream come true!

Summer falls in love with life at the stables and especially with Luna, a beautiful dapple-grey pony. But one day, Summer arrives at the stables to find that Luna has been stolen in the night. It's up to the Starlight Stables Gang to follow the clues and rescue Luna before it's too late!