Feared, hated and outcast. One man's fateful choice, would have enormous consequences.

Hamar's most dangerous man tells the forgotten story about a young man from Hamar who during world war II becomes one of the town's biggest traitors. He is among the Germans' most valuable Norwegian helpers in the county, and gains a reputation as a ruthless and brutal torturer, but also a calculated and cunning agent. He's outcast and hated by the local community, and the resistance make several attempts to take him down.