The narrative follows the exploits of Twm Sion Cati, a legendary figure navigating the social and political landscape of historical Wales. Driven by a need to survive and outwit those in positions of power, the protagonist utilizes his cunning and local knowledge to navigate various challenges. The story operates within a framework that blends historical setting with the adventurous spirit of folk tales. The protagonist faces opposition from authority figures and rival characters who seek to restrict his movements and actions within the rural Welsh environment.

Discussion often centers on the author's ability to capture the spirit of Welsh folklore through the character of Twm Sion Cati. Readers frequently highlight the balance between the historical backdrop and the adventurous nature of the protagonist's exploits. The pacing is noted for being consistent with traditional folk narratives, focusing on individual incidents rather than a singular, long-form arc. Critics often point to the atmospheric setting as a primary strength that grounds the more fantastical elements of the story.