Professor Chardin has just killed a man. Before calling the police to turn himself in, he burns some leaves and a notebook in the fireplace. Secret agents in the street with listening devices flee when the police arrive. The professor refuses to be defended by a lawyer and to explain himself, but his friend Professor Carter and his wife come to his support and he agrees to explain his crime of inventing the H-bomb, the secret of which was stolen from him by his collaborator Rossi at the very moment when he had given up his research, convince...
