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 |
| Production | Asko Apajalahti | Producer |
| Sound | Tuomas Kantelinen | Original Music Composer |
| Editing | Tuomo Leino | Editor |
| Costume & Make-Up | Auli Turtiainen-Kinnunen | Costume Design |
| Lighting | Henry Wacklin | Gaffer |
| Sound | Pasi Peni | Production Sound Mixer |
| Sound | Laura Kuivalainen | Production Sound Mixer |
| Production | Hanna Apajalahti | Production Manager |
| Directing | Malla Hukkanen | Script Supervisor |
| Directing | Anu Hukka | First Assistant Director |
| Editing | Tuija Kotamäki | Negative Cutter |
| Editing | Kari Manns | Colorist |
| Editing | Anita Rautalin | Negative Cutter |
| Camera | Antti Härkönen | Assistant Camera |
| Camera | Marko Mantere | Key Grip |
| Camera | Jukka Talikka | Steadicam Operator |
| Directing | Mika Purola | Second Assistant Director |
| Lighting | Karri Pöykiö | Lighting Technician |
| Lighting | Jari Kairamo | Lighting Technician |
| Lighting | Juha Niska | Lighting Technician |
| Sound | Ilkka Kiukas | Boom Operator |
| Sound | Ilkka Kiukas | Sound Editor |
| 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 |
