Based on steppe nomad legends, and the work of Arany László (based on Hungarian folktales), the eponymous [[CharacterTitle Fehérlófia (Son of the White Horse]]), or more accurately Fanyűvő (Treetearer) is the [[ExactlyWhatItSaysOnTheTin superpowered son of a white mare]].

Shortly after he's born, his mother tells him a story: long ago, there was happiness and peace as [[GodCouple Father God and Mother Goddess]] ruled the world; hovewer, their sons grew restless, and wished for wives. But this soon proved to be to their ruin, as the princesses they were given became curious about that door they were never supposed to open, and unwillingly set [[SealedEvilInACan the evil dragons]] free. The dragons immediately seized power over the world, killing the three brothers and taking the princesses as their wives. Only Father God escaped, but with greatly diminished power. Mother Goddess was, however, captured, while trying to escape in the form of a white mare. While in captivity, she gave birth two times, with both of her sons disappearing. When she became pregnant a third time, she was told that if this son disappears as well, the world will lose its last chance of being saved…

After the death of his mother, Fanyűvő sets out to find his similarly superpowered brothers, Kőmorzsoló (Stonecrumbler) and Vasgyúró (Ironkneader). It is up to them to overthrow the dragons' rule and bring balance back to the world.
This film provides examples of:
* AdaptationalVillainy: Inversion. In the original tale (meaning Arany's), Hétszőnyű Kapanyányimonyók is the villain. Here, he's [[TheHero The Hero's]] father in disguise. Also, in the original tale Fanyűvő's brothers ''did'' betray him.
* BittersweetEnding: On one hand, the dragons have been killed, balance restored, love found. On the other, the closing words could be taken to mean this is a never-ending cycle.
* BlondeBrunetteRedhead: the princesses
* ButtMonkey:Ppoor Kőmorzsoló…
* ChromaticArrangement: Yellow for Fanyűvő, blueish-green for Vasgyúró, red for Kőmorzsoló. Also holds for the the princesses.
* CompositeCharacter: In some versions of the original folk tale (including László Arany's), Fehérlófia and Fanyűvő are separate characters.
* DamselInDistress: The princesses. Somewhat subverted with the third, as she actually helps the hero defeat the dragon holding her captive.
* DarkIsEvil: All the dragons are colored a dark shade.
* DerangedAnimation
* DragonsPreferPrincesses: All three dragons keep a princess captive.
* EvilSoundsDeep: The dragons
* HeroicBSOD: Fanyűvő has two: A brief one when he kills the first dragon, and another one [[MyGodWhatHaveIDone after he tries to kill his brothers]] because he thinks they betrayed him.
* HumongousMecha: The second dragon.
* LightIsGood:Almost all non-evil are drawn in bright colors.
* LoveAtFirstSight
* NervousWreck: Princess no.2. But considering who her husband is…
* NoNameGiven: Only the hero and his brothers get nominal importance.
* OurDragonsAreDifferent: No kidding. The first dragon is a three-headed caveman, the second is a HumongousMecha made of WorldWarII war machines, and the third is a fluid metropolis.
* [[{{Patronymic}} Patronymic:]] Even though it sounds like one, the white horse is actually his mother, but you wouldn't tell that from the name alone. So... inverted?
* PragmaticAdaptation
* PowerTrio
* ReallyWasBornYesterday: Not much time seems to pass between Fanyűvő being born, and being able to walk and talk [[JumpedAtTheCall (and trying to run away from home)]]. Possibly justified in a way, since he was born from a horse.
* RuleOfThree: Three brothers, three princesses, three dragons…
* ScreamingWarrior: Vasgyúró seems to be this.
* SealedEvilInACan: The dragons, before the princesses let them out.
* SecretTestOfCharacter: That business with Hétszőnyű Kapanyányimonyók asking for porridge could have been this… except he still wants to beat Fanyűvő when he tells him not to eat all of it. But then again, Fanyűvő did find the entrance to the Underworld as a result.
* {{Stripperiffic}}: Princess no.1 is somewhat underdressed.
* WarIsHell: The second dragon has the body of a tank, and uses {{BFG}}s.
* WorldTree