The opening of the novel introduces readers to the desolate town of Castroville, Texas, where the young priest, Father Paul-Michel, resides and fulfills his duties despite the challenging conditions. As he shares a meager meal with his sacristan, Frasquito, it becomes clear that tensions are brewing in the area, particularly with the arrival of a hostile commandant. In the midst of this growing turmoil, Cardenio arrives at the presbytery, drenched and in distress, seeking help for his ailing sister who has been bitten by a venomous snake. The priest's willingness to assist sets the stage for a series of events influenced by faith, bravery, and socio-political conflicts within the turbulent landscape of 19th-century Texas. (This is an automatically generated summary.)