In the early 1930s, ten-year-old Alexander is determined to win his school's painting competition to impress his secret love, Lotte. By chance, he comes into possession of the glittering mother-of-pearl paint. However, its disappearance triggers a fierce battle between the A class and the B class.
| Actor | Role |
|---|---|
 Markus KrojerAlexander | Alexander |
 Brigitte HobmeierKlari | Klari |
 Josef HaderHerr Ametsbichler | Herr Ametsbichler |
 Sigi ZimmerschiedKonditor Schneider | Konditor Schneider |
 Gustav Peter WöhlerHerr Schloder | Herr Schloder |
 Dominik NowakMaulwurf | Maulwurf |
| ZZoë MannhardtLotte | Lotte |
 Benedikt HöslLanger Gruber | Langer Gruber |
| TThomas WittmannHeini / Hugo | Heini / Hugo |
 Adele NeuhauserFrau Kerkenreuth | Frau Kerkenreuth |
 Johannes SilberschneiderHerr Ramsauer | Herr Ramsauer |
 Gerd LohmeyerHerr Haselböck | Herr Haselböck |
| SSiegfried TerpoortenMann bei Klari | Mann bei Klari |