Monsieur Beaucaire (Bob Hope) is the barber to France's King Louis XV -- that is, until the royal hairstylist takes up with chambermaid Mimi (Joan Caulfield) and is subsequently banished from the kingdom. Forced to assume someone else's identity, Beaucaire quickly gets wrapped up in an outrageous web of political intrigue, involving an impending war between France and Spain, an assassination plot and his own potential marriage to the Princess of Spain.