aka El cuco de cristal. Clara Merlo, a first-year resident doctor, suffers a fatal heart attack that forces her to undergo a heart transplant. While recovering, the she feels the need to meet her donor, which leads her to a small inland town to learn about the life of the young man who gave her his heart. Clara thus delves into a place full of secrets, a mystery that extends over twenty years, and a closed-off town where, on the very day of her arrival, a baby disappears in a public park.
