The killer has managed to evade the police and Arturo is forced to recognise that there is in fact a killer on the loose threatening the general public. Meanwhile, Marina and Héctor discover a new clue that leads them to the identity of two women who are in grave danger. Searching for them, they end up in the Women's Quarters, where they confront the killer in an epic final battle.

Marina has been kidnapped by the killer but manages to escape, though in her escape she is badly hurt. With Pablo's help, Héctor discovers the identity of the artist behind the picture of the House of Water, and they decide to seek him out to ask about the killer's identity.