When sorcerer Learned Penric hears of the suspected demonic possession of an ox at his brother-in-law’s bridgebuilding worksite, he thinks it an excellent opportunity to tutor his adopted daughter and student sorceress Otta in one of their Temple identifying and restraining such wild chaos elementals before harm comes to their hosts or surroundings.

What begins as an instructive family outing turns anything but routine when a mountain search becomes a much more frightening adventure for Penric and his charges. What is undergone there by both mentor and students will yield lessons both unexpected and far-reaching.