A group of brave children love solving mysteries and dark cases together with their dog, Scamper. They are the Secret Seven, one of the most popular series by the award-winning Enid Blyton, loved by millions of readers all over the world.

The Secret Seven meet and go to have fun at the Healy Down fair, where an amazing amusement park awaits them. However, a series of strange incidents also awaits them – a scarecrow whose clothes are stolen, a fire in a house.