Stories have always kept their audiences at a distance. This course ends that. What if the story knew you were there? Immersive Storytelling explores the future of narrative in a world where physical, virtual, and algorithmic realities increasingly intersect. As media moves beyond the frame of the screen, storytelling shifts from observation to participation. Immersive narratives invite audiences to cross narrative thresholds - to step inside stories, navigate worlds, and experience meaning through presence, interaction, and embodied engagement. Worldbuilding is at the heart of this course: the creation of narrative environments and living story systems with their own internal logic, worlds that participants can inhabit, navigate, and influence. Drawing from theatre, film, interactive media, installation art, performance, architecture, fashion, and emerging technologies, students investigate how stories unfold across environments rather than linear timelines, and how space, interaction, image, and sonic storytelling combine to produce experiences where the boundary between narrative and world dissolves. Working across spatial XR worlds, augmented reality embedded in the city, participatory installations, and performance as interface, students develop a conceptual and creative language for designing immersive narrative systems shaped by perception, agency, embodiment, and world logic. Rather than mastering a single tool, students become spatial narrative designers - equipped to imagine and build experiences that could not exist without the people inside them. The course also confronts artificial intelligence not as a technology to celebrate or dismiss, but as a force reshaping the fundamental conditions of narrative: who authors a story, what agency a participant holds, and whether a story can exist without a human hand behind it. These are not abstract questions. What happens to authorship when a story cannot begin without its audience? What worlds become possible when experience itself becomes the medium? What stories will you choose to tell - and who might be transformed by entering them? Students must register for both the lecture and discussion section of this course. [This ULEC is in category 3, Interdisciplinary Approaches to the Arts & Humanities.]