The book begins in the highland town of Le Monastier, where the author prepares for his solitary journey through the Cévennes. Seeking independence from village inns, he purchases a bulky, fur-lined sleeping-sack and acquires a diminutive, stubborn she-ass named Modestine to carry his baggage. Their departure is fraught with comical mishaps, primarily due to an unstable pack-saddle that repeatedly sheds its cargo and tries the author's patience to its absolute limits.
After struggling up steep, winding mountain paths and learning the hard lessons of donkey-driving—aided by a cynical peasant's advice and a properly weighted goad—the traveller reaches Bouchet St. Nicolas. Here, he experiences the rustic simplicity of a French highland auberge, sharing roof and hearth with unsophisticated locals, before pressing on toward the wild frontier of Gévaudan, historically infamous as the hunting ground of the legendary beast that terrorised the district.
As the journey continues through bitter wind and drenching rain, the traveller faces the trials of navigating a trackless wilderness in the dark. Attempting to camp in a damp pine wood near Fouzilhic, he endures a stormy night wrapped in his sheepskins, sustained only by a tin of sausage, chocolate, and raw brandy. Yet, despite the physical discomforts, he discovers a profound sense of freedom and serenity in sleeping beneath the stars, far removed from the stifling conventions of civilised society.
Crossing into the rugged territory of the Upper Cévennes, the narrative delves deeply into the turbulent history of the Camisards, the Protestant mountaineers who waged a fierce guerrilla war against the armies of Louis XIV. At the Trappist monastery of Our Lady of the Snows, the author finds a strange sanctuary of silence and strict routine, engaging in polite theological debates with earnest monks and visiting boarders who attempt, unsuccessfully, to convert him to Catholicism.
Descending into the valley of the Tarn, the landscape softens into a picturesque realm dominated by noble Spanish chestnut-trees and smiling meadows. Here, the author encounters a deeply pious yet remarkably tolerant Protestant population, engaging in warm conversations with local believers and old men who cherish the memory of their ancestral struggles for religious freedom.
Finally, after traversing the high ridge of St. Pierre and descending into St. Jean du Gard, the journey reaches its emotional conclusion. Having grown strangely attached to his patient, mouse-coloured companion despite their early trials, the author sells Modestine to a new owner, parting with her in a state of genuine melancholy as he prepares to board the diligence for Alais.
