Johan is a two-fisted cop from Gothenburg who is involved in a shootout with jewel burglars. After the smoke clears, one robber and an innocent bystander are dead, shot by his accomplice. Three witnesses, including Helen, identify the deceased crook's trigger-happy colleague as thug extraordinaire Leo Gaut. Gaut quickly threatens the three witnesses, and only Johan, the badge-wearing hero, has the ability to save them.