La ley del monte (1976)

A tough-on-crime street cop must protect the only surviving witness to a strange murderous cult with far reaching plans.

A fearless, globe-trotting, terrorist-battling secret agent has his life turned upside down when he discovers his wife might be having an affair with a used car salesman while terrorists smuggle nuclear war heads into the United States.

In order to foil a terrorist plot, an FBI agent undergoes facial transplant surgery and assumes the identity of a criminal mastermind. The plan turns sour when the criminal wakes up prematurely and seeks revenge.

Luis Fuentes, a singer of Mexican music, comes to know a journalist by the name of Maria Luisa Cortéz and fall madly in love with each other. In time, the couple gets married and come to have a son, Rafael. However, they soon divorce because of Luis's many commitments as a singer. This strains the relationship between Luis and Maria, so much so that Maria, stung by bitterness, teaches her son to despise his father and manages to move from Mexico to the United States to keep Luis from contacting his son. Luis wants nothing more than to regain his lost relationship and affection with his beloved son. Therefore, time after time he visits Maria in hope of winning over his son's affection with little success. Over time, Rafael, now a young man, comes to have a passion for music just like his father despite having a hatred for him.