A young Andalusian shepherd boy named Santiago embarks on a quest to find a hidden treasure after recurring dreams reveal its location. Santiago's journey takes him from his homeland across the Strait of Gibraltar to Tangier and into the Sahara Desert. He must overcome numerous obstacles, including theft, betrayal, and the allure of a simpler life, while navigating the spiritual and physical landscapes of his quest. The narrative framework is primarily third-person, following Santiago's experiences and internal reflections as he learns to interpret omens and listen to his heart.

The Alchemist is widely celebrated for its simple yet profound narrative, often described as an inspirational fable. Readers frequently connect with its themes of following one's dreams and the universal language of the world. Critics often note its allegorical nature and its ability to resonate across different cultures and age groups. The book's enduring popularity stems from its optimistic message about self-discovery and the pursuit of one's destiny.