The murder of two paramedics leads the LAPD and the FBI on separate investigations on a case that could be the precursor to a major terrorist attack. But Brenda fights to remain a step ahead, even though she's forced to work with the counter-terrorism unit's Chief Tommy Delk, who happens to be one of Brenda's fellow finalists for the job of Chief of Police.

Chief of Police Tommy Delk (guest star Courtney B. Vance) assigns Major Crimes a seemingly minor case involving the armed robbery of several medical marijuana dispensaries. But when one of the robberies turns into a murder, the case becomes a test of Brenda’s readiness to move up in the department.

Brenda and the squad investigate the owner of a hip-hop record label when one of his rap artists and six innocent bystanders are gunned down. The case hits home for Gabriel who knows two of the victims from church. Meanwhile, Chief Delk is getting ready to announce the department’s new organizational chart just as Brenda becomes the target of a civil suit against the police department.