Black night hung over Paris, concealing the Death in the sky, and concealing from all men but the Master Spy, the horrible fate that awaited them! Out of the dark ages of history, through a thousand tortured years, comes the Vengeance of the Vikings on the screaming wings of Doom! G-8 and his Battle Aces rode the nostalgia boom ten years after World War I ended. These high-flying exploits were tall tales of a World War that might have been, featuring monster bats, German zombies, wolf-men, harpies, Martians, and even tentacled floating monsters. Most of these monstrosities were the work of Germany's seemingly endless supply of mad scientists, chief of whom was G-8's recurring Nemesis, Herr Doktor Krueger.