The narrative follows Leopold Bloom through a single, ordinary day in Dublin, tracing his internal monologues and external encounters as they mirror the structure of Homer's Odyssey. Leopold Bloom, an advertising canvasser, navigates the streets of Dublin on June 16, 1904, while his wife, Molly, engages in an affair and Stephen Dedalus grapples with his own intellectual and spiritual crises. The narrative framework shifts constantly, utilizing a variety of stylistic modes ranging from journalistic reportage to dramatic script and dense, unpunctuated internal monologue. The characters are constrained by the social, religious, and political realities of early 20th-century Ireland, which dictate their movements and their private anxieties. The text functions as a complex web of allusions, requiring the reader to synthesize disparate cultural references alongside the immediate sensory experiences of the protagonists.

Discussion often centers on the technical complexity of the prose and the radical shift in narrative form that defines the modernist movement. Readers frequently highlight the difficulty of the text, noting that the dense layering of allusions requires significant effort to decode. Critics often examine how the author elevates the mundane details of daily life into a grand, mythic framework. The balance between the internal psychological states of the characters and the external environment remains a primary focus for academic analysis. Many readers find the final chapter particularly notable for its departure from traditional grammatical structures, which serves to emphasize the raw, unmediated nature of the character's thoughts.