A young newspaper man, whose brother is on the police force, becomes strangely involved in the mysterious killing of an Italian bootblack. Suspicion points to a well-known politician but he proves that it was impossible for him to have done the deed. Then the reporter, who for a time turns detective, gets a clue revolving about a startling, ancient method of combat. He follows this up, watches a masked duelist and, with the help of a girl, catches the murderer who justifies his deed on the plea of Slow Vengeance. You will be interested in reading how the reporter got out of a tight corner.