One main feature is its historical accuracy. It likely portrays the medieval time period in a realistic way. For example, it might show the architecture and daily life accurately.
Another feature could be the exploration of the religious aspect. Since it's a medieval setting, religion was a dominant force. The story might delve into how religious institutions functioned, how they influenced people's lives, and how the inquisitor fit into this religious framework. It could show the inquisition process, the trials, and the consequences for those accused of heresy, which was a significant part of medieval religious life.