Major Kalas from the Prague criminal intelligence service has been sent to a small town of Dubá in North Bohemia to help with the investigation of the puzzling death of a child. A gypsy boy has been killed three weeks ago and his body found under a rock. As the investigation continues, another dead boy is found. The boy has bled to death after someone cut his artery with a handsaw. Both deaths are obviously the work of a murderer - a perverted pedophile, sadist who gets sexual satisfaction from the sight of a young boy's blood.
| Directing | Petr Schulhoff | Director |
| Directing | František Matoušek | First Assistant Director |
| Directing | Stanislava Hutková | Assistant Director |
| Directing | Marta Kunstová | Assistant Director |
| Writing | Petr Schulhoff | Story |
| Writing | Petr Schulhoff | Screenplay |
| Crew | Vladimír Körner | Dramaturgy |
| Camera | Emil Sirotek | Director of Photography |
| Camera | František Kučera | Assistant Camera |
| Art | Karel Lier | Production Design |
| Art | Vladimír Ježek | Set Decoration |
| Art | Karel Kracík | Set Decoration |
| Art | Ladislav Winkelhöfer | Set Decoration |
| Costume & Make-Up | Zdena Kadrnožková | Costume Design |
| Costume & Make-Up | Marie Jindrová | Costumer |
| Costume & Make-Up | František Kauler | Costumer |
| Costume & Make-Up | Karel Marek | Makeup & Hair |
| Costume & Make-Up | Marie Džbánková | Makeup & Hair |
| Costume & Make-Up | František Pilný | Makeup & Hair |
| Editing | Jiřina Lukešová | Editor |
| Sound | Miloslav Hůrka | Sound |
| Production | Jiří Krejčí | Production Manager |
| Production | Josef Mojžíš | Unit Production Manager |
| Production | Věra Winkelhöferová | Unit Production Manager |
| Production | Vlasta Mathauserová | Assistant Production Manager |
| Sound | Pavel Blatný | Original Music Composer |
| Sound | Milivoj Uzelac | Conductor |
| Writing | Bedřich Kubala | Creative Producer |
| Production | Ladislav Novotný | Executive Producer |
