The story of poor brake man Jaakko and beautiful train conductor Mimmi, who is also admired by welder Heikki, rapper Ranssu, bricklayer Martsu, and engineer Immu. The story also involves Jenny and Aleksi, a Roma couple who run a construction site canteen.
| Actor | Role |
|---|---|
 Tuija HalonenMimmi | Mimmi |
 Matti OravistoJaakko Mettinen | Jaakko Mettinen |
 Siiri AngerkoskiJenny | Jenny |
 Armas JokioPikku-Aleksi | Pikku-Aleksi |
 Assi NortiaDolores Ramonez | Dolores Ramonez |
| MMartti RomppanenImmu | Immu |
| TToivo AlajärviValde Humander | Valde Humander |
 Matti AulosMartsu | Martsu |
 Pentti ViljanenRanssu | Ranssu |
| HHannes VeivoHeikki | Heikki |
 Pentti Irjala(uncredited) | (uncredited) |
| JJorma Nortimo(uncredited) | (uncredited) |
| LLea Wallin(uncredited) | (uncredited) |
| LLasse Saxelin(uncredited) | (uncredited) |
| SSirkka Breider(uncredited) | (uncredited) |
| SSeija Nortimo(uncredited) | (uncredited) |