The film goes deep into the darkest corners of the crime city with a near-real shot. The film premiered in Los Angeles on September 17, 2012, and former Governor Arnold Schwarzenegger also appeared on the day of its premiere. Taylor (Jack Gyllenhaal Jake Gyllenhaal) and Zavala (Michael Pena Michael Pena) are work partners, and they are also good brothers in life. Together, they patrolled the streets of Los Angeles in the United States, risking life and death, and experienced marriage, the birth of children and other family life together. However, after a routine patrol, they discovered a secret activity of the gang. And this discovery makes them a thorn in the side of Los Angeles's biggest drug dealers. As a result, a cat-and-mouse game with great disparity in strength began.