Martin gets into a routine until he's approached by the HVA.

Martin realizes he needs to take care of Max and Nicole while figuring out what the group has planned in Frankfurt. He discovers he's in one of three terror cells involved in an assassination attempt and identifies Lenora as part of a second cell.

Martin is drugged by the West Germans and interrogated. Meanwhile, the KGB endangers his new love interest, Nicole, and Max. The West Germans rope Martin into traveling with them to Frankfurt. Lenora approaches Fuchs to access a weapons stash.

Martin is arrested and framed for Lenora's assassination plot. As Tina manages to overpower her interrogator, Tischbier is caught up in the fray. Valdez and Brigitte pull the threads of the Kohl assassination attempt. Nicole fears for Max's safety.

Martin is held and tortured by Valdez, who wants to force a false confession. Brigitte teams up with Schweppenstette to save Martin and faces off with Lenora. Nina and Fritz discover the HVA in exile and have a proposition for Fuchs and Dietrich.

Various agencies vie for control of Martin, but Martin must find a way to keep Max safe. Brigitte Winkelmann and CIA agent Hector Valdez task Martin with infiltrating a group of West Germans. Lenora acts on her plan to get out of prison.

Realizing Lenora's involvement in a prominent banker's murder, Martin and Nicole chase her. Schweppenstette entraps a bank employee and brings Staatsbank to East Germany's side. Fuchs and Dietrich lay low in Italy and establish the HVA in exile.

Lenora heads to Italy to meet with Fuchs for help with her next plan. Tina can't let East Germany get away with killing Christoph. Martin faces off with Lenora and she tries to convince him to join in assassinating Kohl. Fuchs teams up with Valdez.