The document discusses the design of transmedia narratives across multiple media. It describes how transmedia narratives can be broken down into narrative, engagement, and interaction design. The design process occurs at the transmedia project, storyworld, story, and scene levels. At each level, tasks are described to shape the overall narrative, user engagement, and interactions. A key part of the design is developing a storyworld that consists of existents, events, and settings that provide a structure for layering multiple stories across different media and timeframes.