Julius Kelp (Jerry Lewis) is a college professor with a problem. Clumsy, awkward, inarticulate and unattractive, Julius is a hopeless case when it comes to women, but he's desperate to impress beautiful student Stella (Stella Stevens). Fortunately, he does know something about chemistry and decides to concoct a potion that will turn him into a whole new man. In this classic comedy, Julius' suave alter ego, Buddy Love, must win Stella's affections before his short-lived potion runs out.