Penny Simms and her best friend Pip are both pony mad. Luckily they attend the equestrian boarding school Fetlocks Hall, but there is a mystery surrounding the disappearance of Pip''s parents, and Penny and Pip are determined to solve it.

With the help of Princess Sophie, a Centaureen, Penny and Pip encounter a magical world of mythical horses, where they struggle to release Pip''s parents from an enchanted spell and reunite the family.