Approximately 200 years of Spanish history (1300-1500) are the focus of this book. Paris sketches the medieval history of the Iberian peninsula, stressing the tolerance of most of the Islamic dynasties, the relative amity between the three major religions of the area, and the flourishing culture that this relatively peaceful era nourished. The 14th century brought division within the Catholic Church itself; a plague that killed 25-30% of the population of Europe; and, in Valencia in 1391, a pogrom that gave its Jewish residents the choice of conversion or death. The "end of days" refers to the second coming of Christ, which would happen only if all the Jews were converted. Over half of the Jewish residents of Spain converted in the 14th and 15th centuries. These "conversos" were the primary target of the early Inquisition. Paris describes the early period of the Inquisition, the motives and actions of the inquisitors, and the fate of those accused. The actual expulsion of the Jews (not the conversos) in 1492 and the Moors (who were also given the opportunity to convert) in 1502 mark the climax of the events of this book.

Before the Inquisition, Spain was a tolerant and peaceful society. How, precisely, does a culture that prizes autonomy and harmony within the population descend so quickly into one of the most oppressive nations to have ever existed? Focusing on the humanity of the major historical players, Erna Paris traces the obscure origins of what was to become a brutal and enduring campaign of religious and ethnic conformity through terror and segregation. The conclusions she draws from the annals of Spanish history are enduring lessons on basic human nature, as applicable to the modern world as they are to the medieval.