Hilarion Zabala has a mysterious, recurring olfactory problem. A psychiatrist suspects a lingering case of phantosmia, a phantom smell, and possibly caused by a deep psychological fracture. One recommended radical cure is that Hilarion must go back and deal with the darkest currents of his past life in the military service. Reassigned in the very remote Pulo Penal Colony, he must also confront the horrific realities of his present situation.