After the fall of the Berlin Wall, a former spy killer is set free and embarks on a revenge spree against the people who conspired to betray her.
Kleo and Sven arrive in Chile, where they track down an elusive Jorge. Later they tangle with Ramona, whose water breaks at an inopportune moment.
Severely wounded in a shooting, Kleo has a revealing flashback. With the ominous red suitcase seemingly in hand, Sven shares a devastating truth.
Kleo and Sven form a wary alliance. Anne visits Kleo claiming to look for her grandfather. After failing to kill her, Uwe sets up a meeting with Kleo.
Kleo heads to Mallorca, chased by Sven. She infiltrates a party and uses a toxin to paralyze Wieczorek's wife, leading him to make a deadly confession.
After Andi is wounded by Kleo, a double agent prevents him from unpacking the conspiracy behind the red suitcase. Sven, Kleo and Min move in on a mole.
With Min and Uwe on her tail, Kleo bribes a little girl to deliver a poisoned Bundt cake to Mielke's jail cell. After a showdown, Kleo digs up a letter.
Determined to find her files, Kleo tracks down her former handler and makes her way into Stasi headquarters. Later, she seeks out Thilo in a dance club.
Top Stasi agent Kleo Straub liquidates a target in a West German nightclub. Soon after, she must face a life-changing betrayal and a heartbreaking loss.