The film follows the actions of a corrupt police captain, the title-character Ángel Lugo, performed by Braulio Castillo, hijo.

Lugo is responsible for the wrongful imprisonment of Mariano Farías (Morales) and the murder of his pregnant wife (Sara Jarque).

For that, he recruits the help of Juan Miranda, the district attorney that originally prosecuted him, who is now a retired alcoholic.

Involved in everything is a female reporter, Julia Norat (Yamaris Latorre), who receives exclusive information from Lugo and has also become his lover.

In a second-round voting, the latter prevailed when a voter abstained (see Submissions for the 80th Academy Award for Best Foreign Language Film).