During a daring robbery, thieves steal a magical artifact of terrifying power - the death mask of Louis Charbon. This mask contains the spirit and knowledge of the surgeon turned serial killer who terrorized the city ten years ago. Now Charbon is free and killing from beyond the grave. But the new crimes are different from the previous ones: the victims no longer seem random, but as if they are leading a mad surgeon to some goal. Now the regulator Krona Hirwat and her colleagues must understand what motivates the mad killer and put an end to his insidious plans. But to do this, they will have to penetrate the mind of Louis Charbon and face the incredible and terrible truth that remained in the mask after his death.