The book revolves around a Swiss classics teacher who, upon encountering a mysterious book by a Portuguese author, becomes obsessed with the life and thoughts of the writer. This obsession leads him to abandon his job and life in Bern, embarking on an impulsive journey to Lisbon. In his quest to understand the author's fate and the resistance movement against the Portuguese dictatorship that the author was involved in, the protagonist explores themes of history, philosophy, and the complexities of human character. As he delves deeper into the past, he encounters various individuals who were connected to the author, piecing together a narrative that challenges his own understanding of life and identity.

The novel delves into the harrowing experience of a man who, after participating in a failed coup, is sentenced to life imprisonment in a Moroccan desert concentration camp. In this hellish environment, he and his fellow inmates endure unimaginable suffering, with the narrative exploring themes of survival, hope, and the human spirit's resilience. Through the protagonist's eyes, the reader witnesses the brutality of his conditions, the struggle to maintain sanity in the face of relentless darkness, and the power of storytelling as a means of preserving one's identity and humanity amidst the most oppressive circumstances.