The narrative Semiotics is based upon the two facts of action and change. Actors often go on by predetermined programs in this field until they reach appropriate meanings. It seems that the dominant discourse is a logical and narrative phenomenon underlying the structure of mythic stories. In this inquiry, we will study the story of the Zahak and Fereydoun from the Shahname composed by Ferdosi from a semiotic perspective and a descriptive-analytic approach to showing that all narrative components of the story go to alter the semantic features. The results showed that the discourse is dynamic, and at the end, the elementary situation changes to a secondary situation. Zahak wishes to attain the throne while Fereydoun wishes to destroy this government: The stages of language transition are described in the four stages of contract, potential, passive, and analytic. The passive-semantic structure of this discourse is dividable into personal, passive and intermediate places according to their locality.