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