Penny Simms is pony mad and is more than a little upset when a flock of foul-smelling pony vampires are found at the equestrian boarding school that she attends. They have been sent by the wicked Devlipeds to disrupt an official health and safety inspection, which the school must pass or risk being closed down.With the help of her intrepid friends, Penny does her best to rid the school of the unwelcome guests with hilarious and unexpected results.

Penny Simms is pony-mad and is thrilled when she wins a scholarship to Fetlocks Hall, an equestrian boarding school. But Fetlocks Hall is no ordinary school - besides schoolwork and riding lessons, Penny has the opportunity to acquire secret knowledge about horses as well as find out about the magical unicorn world of Equitopia. Soon she is caught up in a desperate struggle to help the unicorns combat a terrible plot by the evil Devlipeds, who are plotting to overthrow them. Is Penny the Unicorn Princess whose arrival is predicted by the King of the Unicorns? Can she defeat the Devlipeds and save the unicorns and the pony world?

Fetlocks Hall is in trouble! The school is desperately short of funds and, unless some money can be found, it may have to close! The Headmistress is not sure what to do. Penny is determined to help and draws on her magical powers in a nail-biting bid to solve the problem. Soon Penny and the ghosts, as well as many of the school's ponies, are involved in an exciting race to the finish!

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.