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.
| Directing | Abel Gance | Director |
| Writing | Abel Gance | Writer |
| Camera | Léonce-Henri Burel | Director of Photography |
| Production | Louis Nalpas | Producer |