The story of two men, one married, the other the lover of the other's wife, who meet in the trenches of the First World War, and how their tale becomes a microcosm for the horrors of war.
Nick Carter, the famous detective, is ordered to prosecute the gang of Zigomar. Carter gets into various thorny situations but manages to escape every time, helped by Olga, a former girlfriend of Zigomar. Carter finally manages to trap Zigomar and Zigomar is arrested. However, Zigomar avoids going to court by apparently poisoning himself.
