Come down to Blackberry Farm and meet four horse-mad best friends: Rosie, Alice, Mia and Charlie. The girls stable their ponies at Blackberry Farm's yard, and spend every moment they have with their ponies and each other. But the foursome aren't just good at jumping and showing - they're also great at solving mysteries! The Pony Detectives are super-excited to be going to their first pony camp. And they're even more excited to discover that eventing celebrity Lily Simpson lives near the camp site! When Lily's competition pony, Foxy, disappears from his field, do other campers know more about the disappearance than they are letting on? The Pony Detectives must leap into action on their first celebrity case.