Summary The siege is closing in around Tomás. He tries to talk with Toscano's widow, who suffers from Alzheimer's and doesn't remember trying to contact him. Only later, in a moment of lucidity, does Luísa take him to Toscano's safety deposit box, where she shows him a safe that her husband left for him and a puzzle for Tomás to solve. The cryptanalyst attempts to decipher the riddle, as he gets more and more involved with Helena. Vitória is seriously injured in a confrontation with neo-Nazis, while attempting to vandalize the Monument to the Discoveries. Under pressure from the foundation to get answers, Tomás travels to Genoa and connects the puzzle that was left to him to open the safe with Umberto Eco's work, "Foucault's Pendulum". His discovery is interrupted by the arrival of a mysterious woman, Manuella, who begins talking to him about the Foundation but, when she realizes that they're being watched, invites him to follow her. On the street, the two are chased and Manuella is fatally run over before she can tell him what she knows.

• Crime
• Drama
• Mystery