The mandatory two-year conscription period in the British Army forces two contrasting young men into a rigid environment of drills and discipline. Jonathan Browne and Mike Brady navigate the physical and psychological demands of National Service, each employing different survival strategies to endure the military machine. While Jonathan attempts to maintain a low profile and preserve his autonomy, Mike engages in open defiance against authority. The narrative follows their divergent paths until a singular act of rebellion by Mike forces Jonathan to confront the limitations of his own detachment.

Readers frequently highlight the book's authentic portrayal of the absurdity inherent in military life during the post-war era. Discussion often centers on the stark contrast between the two protagonists and how their differing temperaments serve as a vehicle for social commentary. Critics note the balance between the mundane realities of drill and the escalating tension caused by Mike's impulsive nature. The narrative is often praised for its observational humor and its ability to capture the specific atmosphere of the British Army in the 1950s. Many readers find the exploration of conformity versus individuality to be the most compelling aspect of the work.