Patrice Mersault, a clerk trapped in a monotonous existence, commits a calculated murder to secure the financial freedom necessary to pursue a life of conscious happiness. Driven by a desire to transcend the constraints of his mundane life, Mersault seeks to master his own destiny through the acquisition of time and solitude. His path leads him through various environments, from the stark reality of his office to the sensory richness of the Mediterranean coast. The narrative follows his internal and external shifts as he attempts to reconcile his physical desires with a burgeoning philosophy of moral autonomy. The text functions as a precursor to later existentialist works, utilizing a third-person perspective to examine the protagonist's detachment from conventional social structures.

Readers and critics frequently identify this work as a vital precursor to the author's more famous novels, noting its raw and experimental quality. Discussion often centers on the clear parallels between the protagonist's experiences and the author's own formative years in North Africa. Many observers highlight the stark, sun-drenched atmosphere that defines the setting and influences the protagonist's worldview. While some note the prose is less polished than his later output, it is widely regarded as a significant document for understanding the evolution of his philosophical thought. The text is often studied for its candid exploration of the tension between human desire and the indifference of the natural world.