Sergeant Kalle Ryhmy, Second Lieutenant Ville Romppainen, and Mörökölli the cat travel from the front lines to Helsinki for a vacation. The trio, traveling by train, rescue the mysterious beauty Dora and Argentine war reporter Santa Rosa from a snowdrift, who lead them on the trail of an international spy ring hunting for military secrets.
| Actor | Role |
|---|---|
 Oiva LuhtalaSergeant Major Kalle Ryhmy | Sergeant Major Kalle Ryhmy |
 Reino ValkamaLieutenant Ville Romppainen | Lieutenant Ville Romppainen |
 Kirsti HurmeDora Rastola | Dora Rastola |
 Ville SalminenSanta Rosa | Santa Rosa |
 Santeri KariloKars | Kars |
 Sasu HaapanenVirt | Virt |
 Paavo JännesColonel Rastola | Colonel Rastola |
 Kullervo KalskeLieutenant Kanera | Lieutenant Kanera |
 Vilho SiivolaSanttu | Santtu |
 Hannes HäyrinenJallu | Jallu |
 Salli KarunaMrs. Hölppänen | Mrs. Hölppänen |
 Arvo LehesmaaDirector Hölppänen | Director Hölppänen |
 Kerttu SalmiInnkeeper | Innkeeper |
| IIrja RannikkoManti | Manti |
| JJussi PiironenPolice Constable | Police Constable |
 Rakel LinnanheimoNightclub Singer (uncredited) | Nightclub Singer (uncredited) |
 Emma VäänänenColonel's Housemaid (uncredited) | Colonel's Housemaid (uncredited) |
| EEero MattilaSergeant Vuoksinen (uncredited) | Sergeant Vuoksinen (uncredited) |
| OOnni VeijonenSoldier / Unmasked Stranger (uncredited) | Soldier / Unmasked Stranger (uncredited) |