Marshal Crown arranges for a murderer to be transported to his trial by train, but suspects the killer's gang will try to set him free.

Manuel Jacques Perrin is a young man from the country who tries to make it in Madrid in this somber melodrama. He struggles to survive in the unforgiving city where only the strongest will prosper. Manuel defends himself and kills a murderous thief in a fight then quietly waits for the police to reach the scene of the crime.