The team must decide whether to trust a prisoner who warns them about a dangerous plot. Zapata is caught between the FBI and the CIA. Roman and Crawford butt heads over how to handle a volatile situation.
The remaining members of the team join forces and rush to find a solution, as Jane has been exposed to substantial amounts of ZIP.
Weller and his former FBI partner reunite for a dangerous undercover mission while Zapata interrogates a past foe.
While Jane and Weller partner with a mysterious man from Jane's past to find a missing person, the team races to stop an arms deal.
Jane and Weller are on the hunt for a former colleague. As they track Roman down to where it all started, it is not certain if they have what it takes to finally stop him once and for all.