Paul, Manuel and Zoe try to find out what Amaia was planning together with the murdered priest, Father Jeremías. A path that leads them into dark underworlds, to the Devil's dominion.

Caught up in the crime wave, the students are gobsmacked at the thought that Amaia knew those priests were going to die. What common traits made them end up on her list? What they do know is that no one can be trusted.