A mysterious criminal mastermind shoots Engineer Pierre Saint-Clair and steals his plans for a revolutionary invention. His son, Leo, and a band of young adventurers, pursue the villains, a gang of international anarchists, to Switzerland, where he is captured and murdered. But like a phoenix, he rises from the dead, having gained the power to see in the dark, and sporting a heart made of metal and rubber, powered by electro-magnets. 20-year-old Leo Saint-Clair has now become-the superheroic Nyctalope! Enter the Nyctalope, written in 1933, is the origin story of the greatest of all French pulp heroes, created in 1911 by prolific writer Jean de La Hire. It is presented here with three additional short stories also featuring the Nyctalope.