As Jane Lowry surfaces in Budapest, Mac and Wyatt are forced to go undercover to infiltrate a dangerous group of white supremacists that has something she needs.

Mac and Dr. Markov are taken by white supremacist Josef and Rosa Varga to a secret militia base. Jane Lowery targets Col. Donovan. Wyatt whines about being stabbed. Section 20 takes bold steps rescue Mac and Markov.

With Markov taken by Jane Lowry, Section 20 track them down to a drug lord's mansion. Section 20 carry out a plan to stop Lowry and Markov from unleashing a deadly chemical weapon or the whole world will be at their demise.

Lowry and Borisovich continue their cat and mouse games with each other and with Section 20. As 20 closes in on Lowry and Markov, Lowry initiates a plan to set off a device in an airport. Reynolds emotes about her actions.

It's Section 20 v Jane Lowry in a race to get to Omair Idrisi. It's a mission that hurls comms officer Jensen into extreme danger.

The team learns about Colonel Donovan's involvement in Project Tenebrae. Waves of PMC soldiers trying to recapture Idrisi have a running, driving, and shooting battle with Section 20. Donovan and Lowry have another face to face encounter.

The Russians are coming. Ives loses Idrisi to Russian agents. Twenty goes after the Atlas of covert British agents that Lowry stole and later hid. Stonebridge and Scott's surprise return aids Section 20 in a bold plan.