In a wooden hut used as a canvassing center, members of a children's puppet-theatre group are rehearsing for a production about a journey to the Moon. The goings-on inside the hut and outside are being closely followed by amateur detective Pepik Barnabás. He, however, is the first to be under suspicion when a trunk containing puppets goes missing. The children follow him but, when they catch up with him, they discover he hasn't got it. Pepík offers to help them in their search.
| Directing | Václav Vorlíček | Director |
| Directing | Viktor Karásek | Assistant Director |
| Camera | Stanislav Kautský | Assistant Camera |
| Directing | Milada Mikešová | First Assistant Director |
| Production | Rudolf Wolf | Production Manager |
| Sound | František Belfín | Conductor |
| Camera | Jaroslav Kaiser | Assistant Camera |
| Art | Karel Lukáš | Set Decoration |
| Writing | Václav Vorlíček | Screenplay |
| Art | Vladimír Huja | Set Decoration |
| Sound | Svatopluk Havelka | Music |
| Directing | Věra Plívová-Šimková | Assistant Director |
| Costume & Make-Up | Josef Mann | Makeup & Hair |
| Camera | Jan Stallich | Director of Photography |
| Writing | Josef Brukner | Screenplay |
| Directing | Marie Hejzlarová | Assistant Director |
| Directing | Drahomíra Králová | Assistant Director |
| Editing | Jan Kohout | Editor |
| Sound | Adolf Böhm | Sound |
| Art | Luděk Škuta | Production Design |
| Writing | Josef Brukner | Story |
| Writing | Václav Vorlíček | Story |
| Costume & Make-Up | Blažena Ševčíková | Costumer |
| Costume & Make-Up | Marie Jindrová | Costumer |
| Sound | Svatopluk Havelka | Original Music Composer |
| Production | Ludmila Tikovská | Unit Production Manager |
| Production | František Jaderník | Unit Production Manager |
| Writing | Josef Brukner | Lyricist |
| Production | Ladislav Hanuš | Executive Producer |
| Writing | František Pavlíček | Creative Producer |