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.
Hugo Komaro
as Räkä
Urho Kuokkanen
as Roiskis
Pekka Strang
as Migrén Junior
Kati Outinen
as Migrén Senior
Sampo Sarkola
as Avantovaras
Petteri Pennilä
as Pierunpidättäjä
Elina Knihtilä
as Pormestari Haloonen
Marja Packalén
as Mummi
Matti Onnismaa
as Ihaalainen
Jari Virman
as Mies Toisaalta
Rami Rusinen
as Partamies
Iivari Salo
as Migrén Junior lapsena
