Young construction worker Ralf Reider leaves his home village Katzsprung in the Rhön mountains during the "Berlin Initiative". In the capital, he wants to earn enough money in construction to build his own house for his wife and his child. But Ralf is an unconventional character who soon becomes an outsider because of his behaviour.
| Actor | Role |
|---|---|
 Roman KaminskiRalf Reider | Ralf Reider |
 Peter SodannFritz Siegert | Fritz Siegert |
 Reiner HeiseManne Herford, genannt Maus | Manne Herford, genannt Maus |
 Hans-Uwe BauerMatzke | Matzke |
 Albert HetterleBauleiter Ronnseil | Bauleiter Ronnseil |
 Wolfgang WinklerMeister Kosenkamp | Meister Kosenkamp |
| MManfred GorrSekretär der APO-Leitung | Sekretär der APO-Leitung |
 Arianne BorbachCharlie | Charlie |
 Lutz RiemannBrigadier Eisenbacke | Brigadier Eisenbacke |
 Hildegard AlexFrau Siegert | Frau Siegert |
 Ulrike KrumbiegelHeide Reider | Heide Reider |
 Helga GöringHeides Mutter | Heides Mutter |
| GGünter RügerStraßenfeger | Straßenfeger |
| MManuel SoubeyrandNot listed | Not listed |
| JJoachim UngerNot listed | Not listed |
| AAndré HillerNot listed | Not listed |
| HHans-Otto ReintschNot listed | Not listed |
 Ernst-Georg SchwillNot listed | Not listed |
 Rudolf UlrichNot listed | Not listed |
| GGerd BlahuschekNot listed | Not listed |
 Joachim NimtzNot listed | Not listed |
| DDiana UrbankNot listed | Not listed |