A young man assumes the identity of a long-lost heir to infiltrate a wealthy family and claim a fortune, only to find himself ensnared by the complexities of his new life. Brat Farrar, a drifter with a striking resemblance to the missing Patrick Ashby, accepts a scheme to impersonate the boy who vanished years prior. He must navigate the scrutiny of the Ashby family, the demands of managing their prize stables, and the growing suspicion of those closest to the original heir. The narrative unfolds through a third-person perspective that emphasizes the psychological tension between Brat's deception and his developing genuine attachment to the household. The story operates within the rigid social structures of post-war English country life, where inheritance and reputation dictate the stakes.

Readers frequently highlight the author's ability to maintain suspense without relying on traditional action sequences. Discussion often centers on the moral complexity of the protagonist, as his initial greed transforms into a more nuanced struggle with his conscience. Critics often praise the precise prose and the authentic portrayal of the equestrian world, which adds a layer of realism to the central deception. The narrative is noted for its focus on character psychology rather than sensationalist plot twists. Many readers find the resolution satisfying due to the careful balance between the mystery of the past and the immediate pressures of the present.