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.

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.

A surprise visit from her mother puts Kleo back on the trail of the red suitcase, which could have an unsettling link to her childhood.

With the future of Europe hanging in the balance, Kleo prepares herself for a final confrontation in Moscow.