Detective Ryan Lopez is a rising star in Los Angeles’ elite Gang Task Force. What the world doesn’t know is that long before Ryan was a cop, he pledged allegiance to a different band of brothers – a powerful Latino gang called Los Angelicos.
When Ryan’s best friend and partner is senselessly killed by a notorious gang member, Ryan teams up with longtime Task Force member Cassius Green, who has been at the forefront of the city’s war on organized crime. In this war between law enforcement and gangs, the series explores how every villain has a noble cause, and every hero has a dark side.
Despite his profession, Ryan is still beholden to the gang’s leader, Javier Acosta, the father figure Ryan has tried to make proud his entire life and the man who masterminded his entry into the police force. It’s a secret that has been held for a decade by Ryan, Javier and Javier’s sons: cold-blooded gang lieutenant Carlos; and Ryan’s childhood best friend, straight-laced investment banker Daniel.
But Ryan is even more dedicated to being a cop. He is respected by his team, including Tae Kim, Veronica Dotsen, and Task Force leader Sam Chapel, Ryan’s other surrogate father figure, whose estranged daughter, Jessica Chapel, is Los Angeles County's assistant district attorney (ADA).
Ryan’s education comes from the streets. And that schooling will work to his advantage, as he, Cassius and the rest of the task force take aim at the city’s most dangerous gangs, while his increasing sense of loyalty to his task force family helps him determine which side of the law he is really on. 
- Ramon Rodriguez as Ryan Lopez
- RZA as Cassius Green
- Sung Kang as Tae Kim
- Inbar Lavi as Veronica Dotsen
- Terry O’Quinn as Sam Chapel
- Shantel VanSanten as Jessica Shaw
- Cliff Curtis as Javier Acosta
- Jay Hernandez as Daniel Acosta
- Allen Hughes
- Chris Morgan
- Chris Morgan
- Scott Rosenbaum
- Brian Grazer
- Francie Calfo
- Allen Hughes (Pilot)