Pimpernel Smith is a British thriller film that revolves around archaeologist Horatio Smith (Leslie Howard) and his journey to pre-war Germany for research with a group of archaeology students. He tells the Nazis that he is researching Aryan origins in Germany, even though he is secretly trying to free prisoners of concentration camps. Horatio's students eventually realize his true intentions and volunteer to help him. When Horatio's actions become suspicious, General von Graum (Francis L. Sullivan) is ordered to investigate him and kill him if need be. He forces Ludmilla Koslowski (Mary Morris), the daughter of Polish politician, Sidimir (Peter Gawthorne), to help him by threatening the life of her father. Horatio and his students disguise themselves as Nazis and infiltrate the concentration camp where Sidimir is being held. It is during this time that General von Graum discovers Horatio's true identity. What follows is a series of action-packed events that will change the lives of many people.