A father and daughter involved in the investigation of a murdered teenage girl in the picturesque fictional town of Cárdena, set in Andalusia. The two are forced to put their differences aside and to succumb their tense relationship in order to solve the murder case rocking a supposedly peaceful town, where all inhabitants are suspects.

In Madrid, Spain, a mysterious serial killer ruthlessly murders his victims by recreating the first appearance of several comic book superheroes. Cosme, a veteran police inspector who is about to retire, works on the case along with the tormented inspector David Valentín and his own son Jorge Elías, a nerdy young man who owns a comic book store.