The document discusses Roland Barthes' theory of semiotics and codes within narratives. It provides examples of four types of codes: 1) The hermeneutic (enigma) code which creates mystery and suspense; 2) The proairetic (action) code which builds tension; 3) The symbolic codes which provide deeper meanings; 4) The cultural (referential) code which relies on audience's pre-existing knowledge. These codes provide extra layers of meaning and understanding to the narrative.