Journey to the Core of Creation

It is 1847, and Paris is edging closer to its next revolution, but something is also astir inside Mont Dragon in the Ardèche. This is a place of annual pilgrimage for a band of enigmatic nomads, and also a place of interest to the ambitious Bishop of Viviers. In spite of his distaste for travel, Auguste Dupin makes the long southward journey, in the hope that he might be able to help an old friend...