A man from the nineteenth century wakes up in a transformed, post-revolutionary future and must navigate a society that has abandoned industrial capitalism for a decentralized, agrarian existence. William Guest serves as the reader's proxy, observing a world where the rigid structures of the Victorian era have been replaced by communal living and a profound connection to the natural environment. The narrative follows his movement through a reimagined London and up the Thames, as he engages in dialogue with the inhabitants of this new world to understand the history of the upheaval that brought it into being. The story unfolds as a series of philosophical encounters, prioritizing ideological exploration over traditional plot-driven conflict.

Readers and critics frequently highlight the work as a foundational text in the utopian tradition, noting its departure from the state-centric models common in political literature. Discussion often centers on the tension between Morris's romanticized view of pre-industrial life and the practical realities of his socialist vision. Many observers appreciate the atmospheric descriptions of the Thames and the English countryside, which serve as a backdrop for the book's central ideological arguments. While some find the pacing slow due to the emphasis on dialogue over action, others value the text for its clear articulation of egalitarian convictions and its critique of nineteenth-century industrialization.