Miguel Angel Nava

An American businessman with a stake in a pharmaceutical company that's about to go public finds his life is thrown into turmoil by an incident in Mexico.

After they're arrested, the horrific crimes of two serial killers are revealed via confiscated videotapes. These tapes contain brutal murders displaying pure human wickedness, the background, paraphilias and psyche of these murderers.

A tamal cook and her son are constantly abused by her alcoholic husband. One day, she decides to take revenge the only way she knows of.