In the picturesque Apfelland, nestled amidst Russia, Austria, and Germany, resides Vel, a young boy in the bustling capital of Charlottenburg. His encounter with Frid, a girl in need, unravels a tale of intrigue as she is abducted due to the discovery of radium in her grandfather's forgotten mine. The allure of the precious mineral draws a diverse crowd to the scene: an American seeking wealth, a Polish woman masquerading as a man to fund revolution, and the Apfelland ministry harboring ambitions to align with Germany. Entangled in these competing interests, Vel and Frida hold the key to the mine's enigmatic secrets.