In Lisbon, Portugal, literary forger Catarina Sol steals a supposedly blank manuscript—the legendary Vasiliev Codex—only to discover it writes itself backward when her blood touches its pages. The manuscript mysteriously knows details about her life and her forgeries, writing in the exact handwriting styles she has perfected over years. Joined by her former lover Miguel, now investigating missing codices, they consult Yelena, a blind woman who claims to hear the book's contents in her dreams. As they unravel the mystery, they discover a shocking truth: Catarina is a "Rewriter," someone capable of altering reality through changes to written text. Her forgeries weren't just fake documents—they were revisions to history itself. The manuscript reveals alternate timelines and erased histories Catarina unwittingly created, including a past where she fled Russia with the Codex after a violent confrontation that left Yelena blind.