Casasola, aka "El Poeta" finds a body. In one of the exhibition rooms at the Templo Mayor Museum, Elisa is horrified to discover that there are fresh human remains on a ceremonial altar.

Edith and Mejía go to the Templo Mayor. Casasola and Quintana get a hint regarding a possible new red note. In the Palace of the Archbishop, a ceremonial knife appears, bloody, on an ancient bible.

Elisa sets up an altar, unaware that the Witch has entered her house. Elisa finds a pattern in the crimes. Casasola deduces that there will be a new sacrifice. The Witch leads Elisa into darkness.

Subway guards seesomeone enter the tunnels in the early morning. Reviewing the videos, Mondragon and Casasola come across the serial killer's den. Casasola has nightmares controlled by the Witch.