A seemingly absent-minded archeology professor, Horatio Smith (Howard) helps refugees escape from the Gestapo. During one daring rescue, he is wounded, which reveals his secret to his admiring students. They enthusiastically join him in his fight. But things are complicated when one of his students brings him a mysterious woman in distress, Ludmilla Koslowski (Morris). When her father's life is threatened by the Gestapo, she is forced to secretly work for the enemy. Smith engages in a game of cat-and-mouse with his ruthless adversary, General von Graum (Sullivan), who has been assigned to track him down.