Kazmierz Dziewanowicz's hobby is very strange. He collects people who were born on the 29th of February. One day he sees that in his collection there are two men with the same name, the same birth place, the same date of birth and the same parents. In the middle of the night somebody kills him. The Intelligence Agency begins investigation.
| Directing | Tadeusz Chmielewski | Director |
| Writing | Tadeusz Chmielewski | Screenplay |
| Writing | Ryszard Gontarz | Story |
| Writing | Zygmunt Szeliga | Story |
| Directing | Konrad Paradowski | Assistant Director |
| Directing | Jerzy Karwowski | Assistant Director |
| Writing | Stanisław Dygat | Dialogue |
| Camera | Jerzy Stawicki | Director of Photography |
| Camera | Marek Nowicki | Camera Operator |
| Camera | Ireneusz Jaśkiewicz | Assistant Camera |
| Camera | Stefan Słoński | Assistant Camera |
| Art | Jarosław Świtoniak | Production Design |
| Art | Cecylia Wróblewska | Assistant Production Design |
| Art | Henryk Zeligowski | Assistant Production Design |
| Costume & Make-Up | Katarzyna Chodorowicz | Costume Design |
| Costume & Make-Up | Janina Koźmińska | Costume Design |
| Sound | Adam Walaciński | Music |
| Sound | Stanisław Has | Conductor |
| Sound | Jan Kalisz | Sound |
| Editing | Roman Kolski | Editor |
| Editing | Jadwiga Jakubowska | Editor |
| Costume & Make-Up | Irmina Romanis | Makeup Artist |
| Costume & Make-Up | Anna Włodarczyk | Makeup Artist |
| Production | Ludgierd Romanis | Production Manager |
| Production | Tadeusz Slaby | Assistant Production Manager |
| Production | Bogdan Świtoniak | Assistant Production Manager |
