A daring prison escape in Dublin sets off a frantic pursuit involving criminals, police, and the underworld. Brendan Behan utilizes his own experiences within the penal system to construct a narrative centered on the escape of a prisoner known as the Scarperer. The protagonist must navigate the treacherous social hierarchies of the criminal class while evading the persistent efforts of the authorities. The narrative framework employs a gritty, observational style that emphasizes the claustrophobic nature of confinement and the chaotic reality of life on the run. The story is driven by the tension between the individual's desire for freedom and the rigid, often brutal, structures of the law and the underworld.

Readers and critics frequently note the raw, unvarnished quality of the prose, which reflects Behan's firsthand knowledge of the subject matter. Discussion often centers on the effectiveness of the dialogue in establishing a sense of place and character authenticity. Many observers highlight the balance between the suspenseful pacing of the escape and the detailed character studies of the individuals involved. The work is often praised for its refusal to romanticize the criminal lifestyle, opting instead for a stark portrayal of the consequences of institutionalization. Readers interested in mid-century Irish literature or realistic crime fiction often find this work to be a significant contribution to the genre.