After a bomb detonates at a restaurant in Queens, the case becomes personal for OA, who grew up eating there. But what initially seems like a terrorist attack reveals itself to be more complex, and OA goes undercover to prevent another incident.

After a front-running female presidential candidate, Valerie Caldwell, is targeted with a car bomb, OA and Maggie must hurry to track down the bomber before they strike again. The case leads them to wonder whether this person is targeting Caldwell for her political aspirations or something else.

After a truck filled with armour-piercing rifles is hijacked, the team works to discover who stole it, and what they have planned for the stolen weapons. A friend from OA's past returns to help with the case, but OA isn't sure he can trust him.

The team welcomes a new member, Special Agent Tiffany Wallace, as they search for killers who orchestrated a mass shooting at a media company, and OA’s personal connection with the case threatens to cloud his judgement.