Sisu is a complicated concept. In a way it is pure stoic perseverance in the face of overwhelming odds, but it is important to note that it is not just determination. It is also cleverness, that manifests itself when you most need it. Sisu is finding the solution to a problem, no matter what. This movie is definitely about that. Aatami, our "hero", finds the way.
Being old enough Finn to have known many people of this generation, this isn't even that much of an embellishment.
The movie is quite simplistic. The Finnish characters don't even talk until very late into the movie (which is actually another insight into Finnish culture). You have a goldminer with gold and a company of Nazis hunting him. You can't really go wrong with this storywise. You just have to make the characters and the action interesting enough. Do they? Yes. This might me kind of mild in the age of superhero movies and the more traditional action movies copying the superhero movies, but it works. In some ways kind of refreshing to keep it all more grounded.
While this might be more meaningful to me as a Finn, I would assume that if you enjoy mid-budget action, this will be right up your alley (although, at 6 million euros, the budget was much lower than what would be considered midlevel in bigger markets).
