Eight-years old Kuba is on the trail of a magic stone, which pieces float somewhere in the world. If he puts the pieces together, the magic stone will bring happiness and prosperity to everyone. In search of the magic bits, Kuba and his brother travel through time and space visiting an ancient Gaul pre-Slavic Biskupin.
The Invisible Visor was an East German television series, broadcast with long intervals between 1973 and 1979. In its first and longest season it starred Armin Mueller-Stahl in the role of Werner Bredebusch, a Stasi agent active abroad under the alias Achim Detjen.