In a remote Himalayan village in 1721, the Jesuit priest Ippolito Desideri awaited permission from Rome to continue his mission to convert the Tibetan people to Christianity. In the meantime, he forged ahead with an ambitious project: a treatise, written in classical Tibetan, that would refute key Buddhist doctrines. If he could convince the Buddhist monks that these doctrines were false, thought Desideri, he would dispel the darkness of idolatry...