Set against the backdrop of Barcelona's transformation between the Universal Expositions of 1888 and 1929, the novel follows the life of Onofre Bouvila, a young man who arrives in the city with dreams of success. Through cunning and ambition, Onofre rises from a humble hair tonic salesman to a powerful and influential figure, navigating the social and political upheavals of the time. The story captures the vibrant and tumultuous spirit of Barcelona as it evolves, reflecting on themes of ambition, power, and the relentless pursuit of progress amidst a rapidly changing world.