The horse Karino is born during winter and when his mother dies, a young woman starts to care for the helpless foal. Their adventures together are followed during the years to come, from the age of a newborn to the time when Karino's a full-grown competition horse.
| Actor | Role |
|---|---|
 Claudia RieschelGrażyna Barska | Grażyna Barska |
 Janina BorońskaGrażyna Barska (voice) | Grażyna Barska (voice) |
 Tadeusz SchmidtKlimczak | Klimczak |
 Karol StrasburgerAndrzej Stolarczek | Andrzej Stolarczek |
 Zdzisław MaklakiewiczMałecki | Małecki |
| SStefan CzyżewskiDr. Frankowski | Dr. Frankowski |
 Janusz GajosJanczar | Janczar |
 Władysław HańczaEquestrian club president | Equestrian club president |
 Leon NiemczykJabłecki | Jabłecki |
| SStanisław NiwińskiRusin | Rusin |
 Zygmunt KęstowiczMalinowski | Malinowski |
 Zdzisław KuźniarEquerry | Equerry |
 Kazimierz WichniarzHorse breeding department director | Horse breeding department director |
 Juliusz Lubicz-LisowskiHorse racing gambler | Horse racing gambler |
 Jerzy MoesGambler (uncredited) | Gambler (uncredited) |
 Andrzej ŁągwaJanczar (voice) (uncredited) | Janczar (voice) (uncredited) |