Harold Krebs went off to fight in World War I, "the war to end all wars." But when he comes home, Harold finds that he doesn't fit in any more. He needs peace and quiet to figure out what has happened to him and who he has become, but his mother pressures him to rejoin society.
When the incompetent Officer Frank Drebin seeks the ruthless killer of his partner, he stumbles upon an attempt to assassinate Queen Elizabeth.
On Christmas Eve, a relentlessly cheerful woman escapes from the killers hired by her husband, and embarks on a series of strange encounters.
An ugly duckling having undergone a remarkable change, still harbors feelings for her crush: a carefree playboy, but not before his business-focused brother has something to say about it.