In 1880, the criminal called The Wolf is responsible for a murderous rampage in France. When the Brisson Bank is robbed in Paris and the employee Michelle is murdered, the wealthy Chevalier Lucio del Gardo is the only chance to save the bank. Chevalier proposes to the owner M. de Brisson to deposit a large amount of gold, but in return he would like to marry his daughter Cecile. However, Cecile is in love with the efficient clerk Lucien Cortier that belongs to the lower classes and refuses the engagement. In order to get rid off the rival, Chevalier uses evidences to incriminate Lucien, manipulating the incompetent Parisian chief of police.

Norman Pitkin and Mr Grimsdale are council workmen mending the road outside an Army base when they come into conflict with the military. Shortly afterwards, they get drafted and fall into the clutches of the Sergeant they have just bested. They are sent to France to repair roads in front of the Allied advance but get captured. Pitkin takes advantage of a useful similarity to impersonate General Schreiber and manages to return a hero