A spirited horse navigates the shifting fortunes of life under various owners, serving as a witness to the spectrum of human kindness and cruelty. The protagonist, a well-bred horse named Black Beauty, recounts his life from his early days in a pleasant meadow to his arduous work as a carriage horse in London. He must endure the physical demands of labor and the unpredictable temperament of those who control his fate, ranging from compassionate caretakers to negligent masters. The narrative is presented as an autobiographical account from the perspective of the horse, providing a direct view into the consequences of human behavior on animal welfare.

Readers frequently highlight the effectiveness of the first-person perspective in fostering empathy for the animal protagonist. Discussion often centers on the book's role as a catalyst for legislative changes regarding the treatment of horses during the Victorian era. Critics note the balance between the narrative's sentimental tone and its sharp critique of human negligence and social indifference. The pacing is generally viewed as steady, moving through various stages of the horse's life to illustrate a broader moral argument. Many readers appreciate the historical insight provided into the daily lives and social structures of nineteenth-century England.