The theme in a story is its underlying message, or 'big idea.' In other words, what critical belief about life is the author trying to convey in the writing of a novel, play, short story or poem? This belief, or idea, transcends cultural barriers. It is usually universal in nature. When a theme is universal, it touches on the human experience, regardless of race or language. It is what the story means. Often, a piece of writing will have more than one theme.