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 |
| Costume & Make-Up | Laura Rantaniemi | Makeup Designer |
| Costume & Make-Up | Anna Vilppunen | Costume Design |
| Camera | Jani Kumpulainen | Director of Photography |
| Production | Sami Nikki | Co-Producer |
| Production | Ville Rousu | Co-Producer |
| Production | Minna Sorvoja | Casting |
| Editing | Jyrki Levä | Editor |
| Production | Marko Talli | Producer |
| Production | Olli Haikka | Executive Producer |
| Production | Jorma Reinilä | Executive Producer |
| Sound | Juha Hakanen | Sound Designer |
| Sound | Panu Aaltio | Original Music Composer |
| Production | Minna Virkajärvi | Production Manager |
| Lighting | Toni Haaranen | Lighting Technician |
| Camera | Nea Salminen | First Assistant Camera |
| Lighting | Henry Wacklin | Gaffer |
| Lighting | Jyrimatti Holm | Lighting Technician |
| Writing | Paula Noronen | Book |
| Directing | Melissa Markki | Second Assistant Director |
| Camera | Valpuri Lindberg | Second Assistant Camera |
| Camera | Antris Bonsdorff | Second Assistant Camera |
| Camera | Elina Eränen | Second Assistant Camera |
| Directing | Joona Mielonen | First Assistant Director |
| Directing | Helena Ketonen | Script Supervisor |
| Editing | Pasi Mäkelä | Colorist |
| Sound | Santtu Sierilä | Boom Operator |
| Camera | Hannu-Pekka Vitikainen | Second Unit Director of Photography |
| Sound | Antti Onkila | Production Sound Mixer |
| Lighting | Jari Kairamo | Lighting Technician |
| Sound | Juha Hakanen | Production Sound Mixer |
| Camera | Olli Kukkonen | Key Grip |
| Writing | Joona Tena | Screenplay |
| Writing | Paula Noronen | Screenplay |
| Directing | Joona Tena | Director |
| Crew | Reijo Kontio | Stunt Coordinator |
| Production | Otto Lume | Location Manager |
| Production | Pauli Kairismaa | Location Manager |
