Jerry Landers, an unassuming assistant manager of a grocery store is approached by God in the form of a good natured old man. God informs Jerry that he has been chosen to spread the Word to the world. But when Jerry attempts to spread God's message everyone thinks he's nuts. Even his loving wife Bobbie doubts him.
When God returns to earth, an 11-year-old girl promises to focus the world's attention on the deity by creating an effective advertising slogan for him. Her new project is not well received by the adults in her life, and she is expelled from school and examined by psychiatrists.