Two laboratory dogs escape a research facility and struggle to survive in the harsh English wilderness while being hunted by authorities. Snitter and Rowf, having endured traumatic experimentation, navigate the physical dangers of the Lake District while grappling with the psychological scars of their captivity. Their objective is simple survival, yet they are constantly hindered by their lack of experience in the wild and the mounting hysteria of the human population. The narrative utilizes a third-person perspective that shifts between the dogs' sensory-driven experiences and the bureaucratic, often cold, reactions of the humans pursuing them. The world is defined by the stark contrast between the clinical cruelty of the laboratory and the indifferent, unforgiving nature of the outdoors.

Readers frequently highlight the stark contrast between the lyrical prose and the harrowing subject matter of the narrative. Discussion often centers on the author's ability to evoke empathy for the canine protagonists while simultaneously critiquing human institutional cruelty. Critics often point to the pacing, which shifts from quiet moments of survival to intense, high-stakes sequences of pursuit. The book is widely recognized for its grim tone and its unflinching look at the consequences of scientific experimentation on sentient beings. Many readers note that the story remains a poignant examination of the relationship between humanity and the natural world.