Pamplona (autonomous community of Navarra's capital; north to Spain). One year later of Basajaun's crimes, a nine-months pregnant Inspector Amaia Salazar is on the city court waiting for the trial to Jason Medina, accused to rape, mutilate and kill her stepdaughter Johana Márquez. But just before of the trial, Medina is found on the court's bathroom after commit suicide cutting his veins, leaving a little note in a pocket of his jeans with just one word written: "Tarttalo". It causes that Amaia's breaks waters to birth his son Ibai, making happy her and sculptor and artist gallery James Westford, Amaia's husband. Reinstated to the active service four months later, Amaia is called by her superior to give two different cases: Monseñor Landero and Padre Sarasola requested Amaia specifically to investigate with secrecy the profanation of a little church where it was left a baby's amputated arm in the altar, and a man incarcerated in Logroño (autonomous community of La Rioja's capital) by...