Elena’s Warning Letter to Amaia is the message Elena Ochoa leaves for Amaia Salazar shortly before her death. Found beneath a pillow and delivered unopened, it changes the meaning of Elena’s apparent suicide: rather than a farewell to her family, the letter is a warning about a group that has found her and may also be pursuing Amaia.

Discovery and Delivery

Elena’s daughter calls Amaia in Elizondo after finding the letter beneath her mother’s pillow. The family had decided to stay overnight, and the daughter discovers the envelope as she prepares for bed. She tells Amaia that her mother has apparently committed suicide, then breaks down: despite trying to follow the doctors’ advice and not reinforce Elena’s fears, she has found a letter addressed not to her but to the inspector.

Elena’s boyfriend, Luis, takes over the call and asks Amaia to collect it. He hands her a long, white envelope that has not been opened; Amaia’s name is written on its front. She puts it in her coat pocket, and his visible relief at seeing it taken away contrasts with his warning that Elena’s family has already suffered enough to be spared an obvious conclusion.

The Warning

In the letter, Elena says that the group knows and that she had warned they would find out. She had tried to be careful, but believes they have made their presence known and that something is now inside her, gnawing at her entrails. What she first mistook for heartburn has continued for hours; she is convinced it is devouring and killing her. She therefore sees no point in concealing the situation any longer. The letter records Elena’s experience and conviction, not an independently established explanation for her symptoms.

Elena then identifies a house on the road to Orabidea: an old, dilapidated farmhouse with biscuit-colored walls and a dark roof, standing in the region’s only flat meadow. There are no trees around it, and it is difficult to see from above; a bend in the road brings it suddenly into view. Elena calls it a black house not because of its exterior color, but because of what is inside. She expects Amaia to seek it out despite her request that she not go, and says that if Amaia is who Elena believes her to be, and survived the fate intended for her, avoiding the group will not keep it away.

Reading and Narrative Significance

Amaia cannot wait to read the letter, but does not want to do so at home. In the wind, she searches for somewhere private, tries an old key to a store, and discovers that its lock has been changed. She eventually sits in her car and switches on the light. The sequence makes the envelope a physical object of mounting urgency before its contents disclose the danger: the failed key and the closed store briefly interrupt, rather than relieve, her need to read.

The letter’s first-person account brings Elena’s fear close to the moment of reading, while leaving the identity and nature of the group unexplained. Its warning connects Elena’s death to the threat around Amaia and gives the investigation a specific place to pursue. The final appeal to God offers no reassurance; it closes a message whose central force is the claim that the danger cannot be avoided simply by refusing to look for it.