Marina Velasco, tenacious and experienced inspector of the National Police, comes from Madrid to deal with the case of the robbery of the Codex Calixtinus. Although it has the help of the local forces (the relentless Judge Casal and his team) the mission is not easy. It will be a race against the clock full of obstacles and marked by the pressures of the Government and the Church. At the same time, Natalia and Lazarus, two journalists from a local newspaper in crisis, come to the investigation of the theft to get an interesting exclusive that saves their jobs.