This thesis explores the topic of narrative in the context of musical composition. Narrative based music will be presented in relation to three ethical questions of Criticism, Commonality and Metaphor, communicated to the listener through the medium of narrative. This thesis will demonstrate how I have used these three questions in relation to my own compositional methodology and propose a world-building approach to musical composition, specifically in relation to Delirium; the magic, imagined world in which all my music is connected through a central narrative.