Nels Coxman (Liam Neesen) is the solidest of solid citizens in Kehoe, a (fictional) ski-resort town in the Colorado Rockies. He's the contractor who drives the enormous snow plow that keeps the highways clear in winter, when snow drifts to over ten feet.
When he sets out to avenge his son's murder, his method is as powerful and uncomplicated as snowplowing: force a local criminal to give him a name, kill him, find the next man, and repeat the process.
Eventually this gets complicated because his son's murder was ordered by a psychopathic drug lord, who assumes a rival drug lord is killing his men. No one suspects Nels, the snow-plow guy. Chaos ensues.
This grim situation is played for laughs by Hans Peter Moland, the Norwegian director who made In Order of Disappearance (2014) on which this film is based. His sense of humor recalls John Huston's in Prizzi's Honor (1985).
If you don't mind lots of killing, it's an enjoyable, off-beat action film.