Barthes' narrative code theory proposes that narratives are composed of a series of codes that keep audiences engaged. These include the enigma code, which establishes mysteries; the action code, which suggests more events are yet to occur; the semic code, involving signs that reference additional meanings; the symbolic code using symbolism like opposites; and the cultural code, referring to cultural contexts that provide meaning. These codes provide intrigue, forward momentum, deeper implications and cultural understanding to enhance audience interest in the narrative.