A journalist attempt to stop a mysterious criminal : "Barbe rousse".

One night, someone came looking for Mr. Stevens to take care of an urgent matter … Claude Stevens (played by Claude Machin), who ignored yet the urgent matters, slept an innocent sleep. After returning home, he discovered that Claude has disappeared. And the mysterious kidnapper entrusted an ape to looks after Claude.

About the conflict between social classes through the life of the unhappy Catherine Ferrand, an orphan girl, who is a victim of the jealousy of women and the greed of men.

Hopson, a prestigious scientist, studies the effect of snake venom to cure many diseases of mankind. His son enlists in the army when the Great War breaks out. A series of circumstances will lead the scientist to change his way of thinking about values ​​and principles that until then he had as immovable.

A man overloaded by work accepts the offer of an identical double to perform some of those responsibilities for him, leading to deadly consequences.