The Balmoral Secret follows the path of the royal family's triumphs, tragedies, and secrets. A 50-year journey unfolds through the Scottish countryside, tracing its way into the depths of the monarchy. The castle is not only a haven for the monarchy but also a connection between the past and present. As the role of the "caretaker" evolves from its beginnings during the reign of Queen Victoria to an elaborate espionage network spread across Europe and North America, The Balmoral Secret remains hidden, its nature undergoing a radical change in later years. As the monarchy changes, the "shadow service" continues serving the crown; the "caretakers" answer only to the Almighty.