The film follows the actions of a corrupt police captain, the title-character Ángel Lugo. Lugo is responsible for the wrongful imprisonment of Mariano Farías and the murder of his pregnant wife. After 15 years in a federal prison, Farías is still determined to prove his innocence.
Key credits listed on this page include Jacobo Morales, Gilberto Concepción Suárez, Braulio Castillo Jr., José Félix Gómez, Yamaris Latorre, Miguel Ángel Suárez, Sara Jarque, and René Monclova.