An Atlanta criminal crew consisting of former Navy SEALs Michael Atwood and Russell Welch, Russell’s ex-cop brother Gabe, and corrupt detectives Marcus Belmont and Franco Rodriguez, rob a bank to retrieve a safe deposit box. The box contains information that could overturn the recent conviction of a Jewish-Russian Mafia boss. When Michael brings the safe deposit box to the boss’ wife, Irina, she withholds their reward money and gives Michael and his crew another mission, which involves breaking into a DHS office and stealing more data on her husband. To convince them to take the job, the mafia tortures and then dumps a mortally wounded Russell off in front of the crew, forcing Michael to mercy-kill Russell in front of them, traumatizing Gabe.Triple 9 2016.
The group decides to go forward with the job. As they think of ways they can pull it off, Marcus and Franco suggest a Triple 9 scenario, which involves an officer down call that sends all of the police to the location of the incident, with Marcus nominating his new partner, Chris Allen, a Marine veteran, as the cop to be killed. Marcus tries to befriend Chris as they go out on calls together. During one call, Chris attempts to question a local gang member, Luis Pinto, about a gang-related homicide, only for Luis to attack Chris before being detained for his actions. Chris’s uncle, Jeffrey Allen, is a Sgt. Detective in the police force working on the bank robbery case. Jeffrey gets a lead and discovers that Gabe is one of the people involved in the bank robbery. Gabe, still grieving over his brother, tries to stop the heist from happening by following Chris and Marcus around and telling Chris, but is stopped by both Michael and Jeffrey.
On the day of the heist, Marcus takes Chris to an abandoned housing project to meet an informant with information on their homicide case. As they walk around the building, Marcus slips away, and Luis comes in and tries to find Chris. Chris bumps into Gabe who tries to warn him that he is going to die. Luis then charges in and tries to shoot Chris but hits Gabe. As Luis runs away, Chris confronts a critically wounded Gabe. Before Gabe can say anything, Marcus comes in, triggering a shootout between the two. Gabe is killed, and Marcus is shot in the head. Fearing Marcus is dead, Chris makes the Triple 9 call. Thinking his nephew is the officer down, Jeffrey rushes to the scene. Meanwhile, Michael and Franco break into the DHS office and steal the information with little police disruption. Luis flees the projects and is later shot dead by SWAT after barricading himself in a nearby home.