In 1848, the young bishop Father Jean Marie Latour receives instruction from the Vatican to oversee a newly created diocese in New Mexico. With his good friend Father Joseph Vaillant in tow, the pair attempt to reclaim the region from corrupt priests who have taken mistresses, exhibited greed, and inflicted abuse and genocide on the Mexican and Indigenous residents. But as Father Latour spends more time in New Mexico with the people who have inhabited and influenced it for centuries, he begins to realize that the task he was sent to do is more complicated than anticipated. Rather than leave, he decides to stay and uphold his commitment to the Church and his faith, and gains an eye-opening perspective along the way.