Invisible Agent

Frank Raymond, a New York City printer, discovers the hard way that many governments know his true identity as Frank Griffin, named after his grandfather, the inventor of a drug that can make one invisible, that drug which only he now has in his possession, and that those governments would like to get their hands on it as a useful tool in war. Frank has no intention on ever selling or releasing the drug in knowing its power, but changes his mind when the US enters WWII, he only allowing its use by the US on the condition that he be the only one ever to use it in being their literally invisible agent of war. His mission behind enemy lines in Germany: to discover the Nazi plans for sabotaging the US military. Through their underground contact, Arnold Schmidt, Frank meets Maria Sorenson, a Mata Hari-esque member of the German Secret Service who would have access to people holding such information and who seemingly is working as a double agent for the Allied forces, Frank still does not completely trusting her. Beyond whether Maria is working for the Nazis or the Allieds, the other issue for Frank is that specific agents working for the Germans and the Japanese know about him and the invisibility, they taking appropriate measures under his circumstance to apprehend him to get the secret of the drug.