This is the story of the adventures of one happy family. By chance they became the owners of an old English castle. The building kept its secrets: the children of the former owners disappeared here. Strange things began to happen to the Thompsons, and no one, no one at all, could help them. Then the youngest daughter Stefania and her twin brothers began their own investigation! Amazing acquaintances, a dangerous dungeon labyrinth, enchanted mirrors, ghosts and secret rooms are just a small part of the adventures that befell children and their parents on the pages of books called “The Mystery of the English Castle” .