The engineer Karl Hartmann invents a new, gigantic brown coal excavator. He discovers that there are large deposits below his home country and decides to use the excavator there.
| Actor | Role |
|---|---|
 Heinrich GeorgeDirektor March | Direktor March |
 Viola GardenOlga Lossen | Olga Lossen |
 Ivan Koval-SamborskiyIngenieur Karl Hartmann | Ingenieur Karl Hartmann |
 Ilse StobrawaCamilla von Einerm | Camilla von Einerm |
 Gertrud ArnoldDie alte Hartmann | Die alte Hartmann |
 Paul BiensfeldtInspektor Bachmann | Inspektor Bachmann |
| PPaul HenckelsGemeindevorsteher | Gemeindevorsteher |
| IIlse VigdorZofe | Zofe |