This paper examines the story generation capabilities of generative AI, which are increasingly utilized across various industries. The narrative of the classic novel Don Quixote was input into ChatGPT, a generative AI model, and reconstructed through natural language prompts that applied the MacGuffin technique to create new story structures. The AI-generated narratives, produced in the forms of synopses and scene-by-scene treatments, were compared with the original work to evaluate narrative completeness. Furthermore, the reconstructed narratives were transformed into screenplay and game event formats to assess their potential applications in various media content. The results indicate that generative AI achieved meaningful outcomes in restructuring the original story into a reversal-based narrative using the MacGuffin structure. It also demonstrated sufficient capability to adapt stories for character dialogues and scene direction. Therefore, this paper suggests that generative AI can function as a supportive tool for human writers in the idea development and pre-production stages of screenplay and digital content creation.