TL;DR 1944, Finnish gold prospector (and Winter War veteran) hits a motherlode, has it taken by authoritarian occupiers (a platoon of Nazi troops), recovers said property by satisfyingly violent means
Just watched it yesterday. Think of John Wick's Finnish grandfather. It's not super-duper amazing and was shot with quite low-budget (obviously), but if you enjoy scenes of tundra in summer, and (mostly) silent acting laced with ample violence, this might be for you. Don't know where the dog came from, there wouldn't have been that sort of doggies in Lapland back in those days. A Finnish Lapphund or Finnish Spitz would've been more plausible as his companion.
I'd imagine his character is partially based on Simo Häyhä AKA The White Death. The Jäger/sniper that killed 500+ Soviet troops during the Winter War.
Simo was exceptionally talented at his craft, and used his own rifle that had none of the more modern aids (no scope). He did not enjoy what he did, but figured it was a job that had to be done. Then he got seriously wounded to his face, the war ended and he went back home to lead a peaceful life until the ripe old age of 96. This movie character is more of a close combat kind of guy, and it's all taking place in the summer (it's costly to film in a pile of snow). Entertaining, though.