Snot and Splash travel to their grandmother's house in the small town of Mouthwash for a winter holiday. Once there, they discover that everything is a little off in what used to be a very ordinary town. The strangest thing is that holes are disappearing from the town. Snot and Splash set out to investigate and manage to get on the trail of a local dentist, Migrén Junior. However, the investigation is in danger of failing when messy Snot and diligent Splash get into an argument with each other. How can Mouthwash be restored and the holes put back in place if the boys can't work together? The only way to restore the world is for the brothers to work together.
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| Production | Jani Pösö | Executive Producer |
| Production | Teemu Nikki | Executive Producer |
| Production | Mikko Leino | Executive Producer |
| Production | Johanna Karppinen | Executive Producer |
| Production | Anita Hyppönen | Line Producer |
| Writing | Ilja Rautsi | Screenplay |
| Camera | Tuomo Hutri | Director of Photography |
| Editing | Jussi Sandhu | Editor |
| Sound | Zacharias Kullman | Sound Designer |
| Art | Santtu Toivola | Production Design |
| Costume & Make-Up | Anna Vilppunen | Costume Design |
| Costume & Make-Up | Maia Hirvonen | Makeup Designer |
| Directing | Tuula Nikkola | Assistant Director |
| Production | Aino Suvanto | Production Manager |
| Directing | Milla Nokelainen | Second Assistant Director |
| Directing | Miro Seppänen | Third Assistant Director |
| Production | Minna Sorvoja | Casting |
| Camera | Nea Salminen | First Assistant Camera |
| Camera | Valpuri Lindberg | Second Assistant Camera |
| Camera | Nelli Nyman | Second Assistant Camera |
| Camera | Teemu Rosenqvist | Second Assistant Camera |
| Directing | Sanna Östman | Script Supervisor |
| Directing | Sara Laaksonen | Script Supervisor |
| Camera | Marko Mantere | Key Grip |
| Lighting | Aki Karppinen | Gaffer |
| Lighting | Colin Thaa | Lighting Technician |
| Sound | Sami Kiiski | Production Sound Mixer |
| Editing | Timo Luomanen | Colorist |
| Visual Effects | Hugo Kiekeben | VFX Artist |
| Sound | Pietu Korhonen | Foley Supervisor |
| Sound | Pietu Korhonen | Foley Editor |
| Crew | Raine Toikkanen | Special Effects Technician |
| Crew | Reijo Kontio | Stunt Coordinator |
| Art | Mikko Soukkala | Location Scout |
| Production | Mikko Soukkala | Location Manager |
| Art | Petri Kyttälä | Location Scout |
| Production | Petri Kyttälä | Location Manager |
| Editing | Eero Seppänen | Online Editor |
| Visual Effects | Pedro Furet | VFX Artist |
| Visual Effects | Tero Malinen | VFX Artist |
| Crew | Jouni Kivimäki | Stunt Coordinator |
| Visual Effects | Lasse Kilpiä | VFX Artist |
| Crew | Amin Kassam | Special Effects Technician |
| Visual Effects | Carlos Santos | VFX Artist |
| Directing | Teemu Nikki | Director |
| Writing | Juice Leskinen | Book |
| Production | Jani Pösö | Producer |
| Production | Ari Matikainen | Producer |
