Emilia is een kind van gescheiden ouders dat in Helsinki woont. Haar leven is doodgewoon; ze gaat naar school, verblijft af en toe bij haar vader en dan weer bij haar moeder. Op een dag wordt ze gebeten door haar cavia, waarna ze ineens kan veranderen in een wollige superheld, die kan vliegen en problemen oplossen. De haringen in de Finse Golf schreeuwen om hulp, omdat hun wateren vergiftigd worden. Emilia gaat ze helpen.
Nee, helaas is Supermarsu nog niet beschikbaar op Netflix in Nederland.
| Art | Toni Kari | Production Design |
| Sound | Sami Sarhamaa | Sound Re-Recording Mixer |
| Editing | Jyrki Levä | Editor |
| Production | Marko Talli | Producer |
| Production | Sami Nikki | Co-Producer |
| Camera | Jani Kumpulainen | Director of Photography |
| Production | Minna Sorvoja | Casting |
| Production | Ville Rousu | Co-Producer |
| Costume & Make-Up | Laura Rantaniemi | Makeup Designer |
| Sound | Juha Hakanen | Sound Designer |
| Production | Jorma Reinilä | Executive Producer |
| Production | Olli Haikka | Executive Producer |
| Costume & Make-Up | Anna Vilppunen | Costume Design |
| Production | Minna Virkajärvi | Production Manager |
| Sound | Panu Aaltio | Original Music Composer |
| Lighting | Jyrimatti Holm | Lighting Technician |
| Camera | Nea Salminen | First Assistant Camera |
| Lighting | Toni Haaranen | Lighting Technician |
| Lighting | Henry Wacklin | Gaffer |
| Camera | Antris Bonsdorff | Second Assistant Camera |
| Directing | Melissa Markki | Second Assistant Director |
| Writing | Paula Noronen | Book |
| Camera | Elina Eränen | Second Assistant Camera |
| Sound | Antti Onkila | Production Sound Mixer |
| Camera | Valpuri Lindberg | Second Assistant Camera |
| Directing | Helena Ketonen | Script Supervisor |
| Directing | Joona Mielonen | First Assistant Director |
| Sound | Juha Hakanen | Production Sound Mixer |
| Sound | Santtu Sierilä | Boom Operator |
| Camera | Olli Kukkonen | Key Grip |
| Lighting | Jari Kairamo | Lighting Technician |
| Editing | Pasi Mäkelä | Colorist |
| Camera | Hannu-Pekka Vitikainen | Second Unit Director of Photography |
| Directing | Joona Tena | Director |
| Writing | Joona Tena | Screenplay |
| Writing | Paula Noronen | Screenplay |
| Crew | Reijo Kontio | Stunt Coordinator |
| Production | Otto Lume | Location Manager |
| Production | Pauli Kairismaa | Location Manager |
| Visual Effects | Zero Tuonela | Animation Director |
| Visual Effects | Sami Nikki | Animation Director |
| Visual Effects | Mikko Heiskanen | Animation |
| Visual Effects | Antti Lempinen | Animation |
| Visual Effects | Tuomas Tulijoki | Animation |
| Visual Effects | Tero Mattila | Animation |
