A group of brave children are thrilled to solve mysteries and dark cases together with their dog, Scooby. These are the Secret Seven, one of the most popular series by the award-winning Enid Blyton, loved by millions of readers worldwide.

The Secret Seven spend their mornings playing snowball fights and building snowmen. In the evening, Jack discovers that he has lost his badge.

He secretly returns to the park to find it and is amazed by a mysterious truck that appears out of nowhere and the strange sounds that fill the quiet night. What role does the mysterious caretaker, who pretends to be the jester, play? And what are those voices coming from the deserted farmhouse?