The film tells about members of Finnish women's Lotta Service during the Second World War through the eyes of three young women.
Unfortunately the movie Promise is not yet available on HBO Max.
| Directing | Ilkka Vanne | Director |
| Sound | Pasi Peni | Production Sound Mixer |
| Lighting | Henry Wacklin | Gaffer |
| Production | Asko Apajalahti | Producer |
| Editing | Tuomo Leino | Editor |
| Sound | Tuomas Kantelinen | Original Music Composer |
| Costume & Make-Up | Auli Turtiainen-Kinnunen | Costume Design |
| Sound | Laura Kuivalainen | Production Sound Mixer |
| Production | Hanna Apajalahti | Production Manager |
| Directing | Malla Hukkanen | Script Supervisor |
| Directing | Anu Hukka | First Assistant Director |
| Editing | Anita Rautalin | Negative Cutter |
| Editing | Kari Manns | Colorist |
| Editing | Tuija Kotamäki | Negative Cutter |
| Camera | Antti Härkönen | Assistant Camera |
| Camera | Marko Mantere | Key Grip |
| Camera | Jukka Talikka | Steadicam Operator |
| Lighting | Karri Pöykiö | Lighting Technician |
| Sound | Ilkka Kiukas | Sound Editor |
| Sound | Ilkka Kiukas | Boom Operator |
| Lighting | Jari Kairamo | Lighting Technician |
| Directing | Mika Purola | Second Assistant Director |
| Lighting | Juha Niska | Lighting Technician |
| Sound | Heikki Kossi | Sound Editor |
| Art | Pentti Valkeasuo | Production Design |
| Camera | Jani Kumpulainen | Director of Photography |
| Crew | Juha Pursiainen | Stunt Coordinator |
| Sound | Pekka Karjalainen | Sound Designer |
| Camera | Sami Toro | Grip |
| Production | Hanna Virolainen | Production Assistant |
| Camera | Konsta Sohlberg | Grip |
| Production | Timo Jyllikoski | Location Manager |
| Camera | Sari Aaltonen | "B" Camera Operator |
| Camera | Malla Hukkanen | Still Photographer |
| Art | Riina Sipiläinen | Property Master |
| Crew | Amin Kassam | Special Effects Technician |
