Ediciones B 2018

Since she was raped in a hotel room, young psychiatrist Emma Stein has not left her house.

She had been the third victim of a psychopathic killer and the only one to escape alive, although she never saw his face.

One day, the mailman delivers a package addressed to her neighbor, whom she does not know. By accepting it, she has no idea that she is about to enter her worst nightmare.