A group of brave children are thrilled to solve mysteries and dark cases along with their dog, Scamper. They are the Secret Seven, one of the most popular series by the multi-award-winning Enid Blyton that has been loved by millions of readers around the world. The Secret Seven spend their morning playing snowball fights and building snowmen. In the evening, Jack discovers he has lost his badge. He secretly returns to the park to find it and is amazed by a strange truck that appears out of nowhere and by the strange noises that fill the quiet night. What role does the mysterious caretaker who pretends to be deaf play? And what are those voices coming from the deserted farmhouse?