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). 　　After 15 years in a federal prison, Farías is still determined to prove his innocence. For that, he recruits the help of Jua...