Mum and new husband Frank are off on a record-breaking trip to Iceland. But where do Josh and Sara go? To their step-dad's Great Aunt Agatha's, that's where. Aggie Baggie is about a hundred years old, has a hairy nose and sleeps all day. Luckily Josh and Sara have brought their scooters with them. They start a Scooter Gang. But should a dog called Scooter be allowed to join? And why does a rival scooter gang start dressing in the same red T-shirts? It seems Josh and Sara's Scooter Gang and their new friends are scooting straight into trouble.