Having developed a formula, that when applied to clothing renders a person invisible, an evil genius calling himself "The Phantom Ruler" is bent on creating an army of "invisible" soldiers in his efforts to rule the planet. Cloaked in invisibility, "The Phantom Ruler" is able to steal money and materials to move forward with his plans of domination. In steps investigator Lane Carson (Richard Webb, Out of the Past), who's out to foil those plans. With the assistance of detective Carol Richards (Aline Towne, Send Me No Flowers) they are soon hot on the heels of the would-be dictator and his henchman. With action and adventure at every turn, The Invisible Monster offers 12 heart-pounding chapters that include Slaves of the Phantom, High Voltage Dangerand Death's Highway.