After three customs officers are shot dead in a cargo heist, the team entrusts OA's old army buddy Clay to help determine if it was an inside job.

After two jurors for a high-profile mafia trial are gunned down, the team jumps into an organized crime investigation until it is discovered that the jurors may not have been the intended targets at all. The case becomes personal for Scola when he learns that one of his former drill instructors from the military academy he attended may be linked.

When a famous rapper and two teen fans are gunned down on his tour bus, the team discovers there may be more to the story than his feud with another rapper. Meanwhile, Isobel hits a major milestone that has her contemplating her future at the Bureau.