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.

The corpse of a young man appears in a forest on the island of La Gomera. The case closes with the accusation to a local politician who is exonerated in the later judgment. Three years later, Sergeant Bevilaqua and his assistant, Corporal Chamorro, are sent to the island to revive the investigation. Corporal Anglada accompanies them, the last one who saw the young man alive.