"This is the best-organized effort to gather absolute power and subdue any resistance. Without knowledge, there is no doubt, without doubt, there is no thought, without thought, there is no inspiration, without inspiration, there is no freedom, without freedom, there is no reaction."

Thessaloniki, 2015. How is a conspiracy theory constructed? Achilles accepts his professor's challenge. The journey begins, and its end is unpredictable. The story becomes an obsession, imagination becomes reality. The truth lurks behind a heinous crime.

Europe, 1558. The Codex of Forbidden Books is a reality. Who is responsible for protecting the Forbidden Knowledge? Shadows come to light in the streets of Paris, in the principality of Savoy, in Toroni, in Rome, as well as in the foundations of the newly built Tower of the Lions in Ottoman Thessaloniki.

Veria, 1970. What clues lead to the descendants of the Protectors of Knowledge? How is the murder of a teenage poet connected to the professor's dark past?

The past, both distant and recent, evolves in parallel with Achilles' present as he seeks redemption (if it coincides with the truth) through the shadows of his history.