

After the fact arises, Abbone -Abad of the temple- asks Guillermo to investigate about it, since suspect that it is a murder. The man was found dead on the floor of the abbey library - an exquisite maze of bookshelves filled with books - after falling from the top of the Aedificium Octagon. The meeting turns out to be a success, but the atmosphere is clouded by the sudden and mysterious death of the illustrator Adelmo da Otranto. The objective: discuss corruption cases (heresies) that stain the apostolic vow of poverty and that - supposedly - they are driven by a faction of the Franciscans. Upon arrival, they arrange the meeting with the monks and delegates of Pope John XXII.

The destination: a Benedictine monastery in northern Italy. In the winter of 1327, the Franciscan Guillermo de Baskerville travels with his disciple Melk's adso for holding a council.
