A mysterious stranger has ingratiated himself with a kind University of Chicago physics professor, who allows him to show up daily at one of his labs. This man, who is not a student or employed by anyone, pounds on his typewriter, checks out books from the library, and uses the copy machine. But no one knows what he is actually doing. Is he a self-taught physics genius? Or is he insane? Years after he started arriving daily at the lab, this documentary short uses hidden-camera video and narration to try to solve the mystery of the Strange Little Man.