In one royal forest, where coal miner Patočka lives and works, the friendly dragon Mrak settles down. The king's lackeys come across him while hunting and, terrified, go to sell the news to the king. He is currently organizing his daughter Viola's birthday party. The hunters describe the dragon in terrifying colors, and so the king concludes that the dragon will, according to tradition, want the king's daughter. So he announces a reward for killing the dragon, but no one wants to fight him. The only one who applies is the princess's favorite, the lutenist Marian, but the king does not like him, so he throws him out. Her brother Jan wants to save the princess, but the king doesn't want to allow it...
Unfortunately the movie There is a Dragon Behind Humny is not yet available on HBO Max.
| Directing | Radim Cvrček | Director |
| Directing | Eva Stedlová | Assistant Director |
| Camera | Karel Kopecký | Director of Photography |
| Art | Jaroslav Chytrý | Set Decoration |
| Costume & Make-Up | Dušan Brodanský | Makeup & Hair |
| Crew | Karel Kopecký | Special Effects |
| Crew | Ivo Hejcman | Special Effects |
| Art | Josef Havlíček | Assistant Production Design |
| Art | Josef Vojtásek | Set Decoration |
| Costume & Make-Up | Jindřiška Raabová | Makeup & Hair |
| Sound | Ladislav Procházka | Sound Assistant |
| Crew | Zdeněk Rozkopal | Special Effects |
| Camera | Otto Kamenský | Still Photographer |
| Sound | Jiří Zobač | Music Director |
| Writing | Markéta Zinnerová | Screenplay |
| Crew | Jaroslav Petřík | Dramaturgy |
| Costume & Make-Up | Lubomíra Jančová | Costumer |
| Sound | Radomír Koutek | Sound |
| Writing | Markéta Zinnerová | Story |
| Production | Věra Kopecká | Unit Production Manager |
| Camera | Renata Bobková | Clapper Loader |
| Directing | František Hlaváček | Assistant Director |
| Costume & Make-Up | František Zapletal | Costumer |
| Crew | Jindřich Liška | Special Effects |
| Directing | Ivan Frič | First Assistant Director |
| Camera | Arne Parduba | Camera Operator |
| Costume & Make-Up | Taťána Havlíčková | Costume Design |
| Costume & Make-Up | Marie Uherková | Costumer |
| Editing | Vlasta Malotová | Assistant Editor |
| Art | Ivo Formánek | Set Decoration |
| Art | Zdeněk Rozkopal | Production Design |
| Costume & Make-Up | Ctibor Kloupar | Makeup & Hair |
| Editing | Marie Vrlová | Assistant Editor |
| Editing | Antonín Štrojsa | Editor |
| Production | Jiří Zemanec | Unit Production Manager |
| Production | Marie Šenkeříková | Assistant Production Manager |
| Sound | Dalibor Mašek | Vocals |
| Sound | Štěpán Koníček | Conductor |
| Sound | Harry Macourek | Original Music Composer |
| Production | Zdeněk Stibor | Production Manager |
| Writing | Ivo T. Havlů | Lyricist |
| Production | Kamil Spáčil | Assistant Production Manager |
