Four children - Mari, Sadu, Olav and Anton form a secret society to play hide-and seek games invented by Mari's grandfather, a professor at the university. When the city is attacked by a mysterious poison which turns adults into children our gang embarks on a quest for the antidote.
| Directing | Margus Paju | Director |
| Writing | Mihkel Ulman | Writer |
| Writing | Christian Gamst Miller-Harris | Writer |
| Camera | Meelis Veeremets | Director of Photography |
| Production | Esko Rips | Producer |
| Production | Diana Mikita | Producer |
| Writing | Mika Keränen | Novel |
| Costume & Make-Up | Kristina Lõuk | Costume Design |
| Editing | Harri Ylönen | Editor |
| Editing | Marion Koppel | Editor |
| Sound | Matis Rei | Sound |
| Sound | Tarvo Schmeimann | Sound |
| Production | Jesse Fryckman | Co-Producer |
| Sound | Liina Sumera | Music |
| Production | Oskar Lehemaa | Casting |
| Visual Effects | Jan Viljus | Visual Effects |
| Art | Imre Paabo | Set Designer |
| Sound | Michael Pärt | Music Editor |
| Costume & Make-Up | Kairit Nieländer | Makeup Artist |
| Art | Juhan Malmstein | Set Designer |
| Art | Kaisa Mäkinen | Production Design |
| Art | Jaagup Roomet | Production Design |
| Art | Triin Valvas | Art Direction |
| Art | Karin Tetsmann | Set Decoration |
| Costume & Make-Up | Piret Sootla | Makeup Artist |
| Costume & Make-Up | Alina Panova | Makeup Artist |
| Directing | Ralf Siig | First Assistant Director |
| Directing | Liina Tiido | Second Assistant Director |
| Sound | Valter Jakovlev | Sound Mixer |
| Sound | Jonas Andreas Jensen | Sound Designer |
| Sound | Ann Reimann | Sound Editor |
| Sound | Tarvo Schmeimann | ADR Supervisor |
| Sound | Luke Shrewsbury | Sound Effects Editor |
| Visual Effects | Rauno Linnamäe | Special Effects Supervisor |
| Crew | Hendrik Proosa | Compositor |
| Camera | Ants Martin Vahur | Steadicam Operator |
| Lighting | Alvar Kõue | Gaffer |
| Production | Anni Aguraijuja | Casting |
| Crew | Andres Mirme | Stunts |
| Writing | Tom Abrams | Co-Writer |
| Directing | Helen Takkin | Second Unit Director |
| Directing | Oskar Lehemaa | Second Unit Director |
| Crew | Marina Kesler | Choreographer |
| Sound | Tapio Liukkonen | Foley Artist |
| Crew | Enar Tarmo | Stunt Coordinator |
| Sound | Silver Sepp | Songs |
| Sound | Kristiina Ehin | Songs |
| Camera | Mihkel Soe | First Assistant "A" Camera |
| Camera | Markus Orav | Second Assistant "A" Camera |
| Camera | Kārlis Jaunzems | Second Assistant "A" Camera |
| Camera | Rein Pruul | First Assistant "B" Camera |
| Camera | Alvar Kõue | Key Grip |
| Camera | Indrek Šeiko | Jimmy Jib Operator |
| Camera | Siim Kaarel Saluri | Jimmy Jib Operator |
| Camera | Roberts Dreimanis | Jimmy Jib Operator |
| Camera | Viktors Besaraba | Jimmy Jib Operator |
| Art | Anni Lindal | Standby Property Master |
| Art | Markus Puusild | Assistant Property Master |
| Camera | Heiko Sikka | Second Unit Director of Photography |
| Camera | Rein Pruul | First Assistant Camera |
| Directing | Kertu Kokk | Continuity |
| Crew | Rauno Linnamäe | Special Effects |
| Camera | Gabriela Urm | Still Photographer |
| Camera | Liisi Anvelt | Still Photographer |
| Camera | Heikki Leis | Still Photographer |
| Camera | Patrik Tamm | Still Photographer |