This novel imagines a post-apocalyptic England, reverted to a medieval state of nature after an unspecified disaster. The story unfolds in two parts: the first describes the transformation of the landscape and the re-emergence of wild flora and fauna, as well as the formation of lakes and marshes from the flooded ruins of London. The second part follows the adventures of a young nobleman, Felix Aquila, as he navigates this radically changed world. Seeking freedom and a place in society, Felix embarks on a journey across the dangerous and wild countryside, encountering various communities that have adapted in diverse ways to the new conditions. Through his quest for a better life, the narrative explores themes of survival, societal collapse, and the resilience of nature.

The 4144th greatest book of all time