East Germany is selling disgruntled citizens to West Germany for money. In the GDR, two sisters fight for their respective ideals on socialism.

Lotte discovers a toxic waste landfill and decides to expose it. Margot must deal with someone from her past who she'd hoped to never hear from.

Ina is determined to get Roland sold and transferred to the West. Meanwhile, Ingo is sentenced to prison, and the environmental movement is targeted.

Margot prepares for the worst, transferring money to Swiss bank accounts. In a daring manoeuvre, she has Roland taken from prison and sent to the West.

The fall of the Berlin Wall in 1989 brings unprecedented change, and Margot must act fast. Lotte hopes for a new kind of socialism.

As the walls crumble around them, the heads of KoKo scurry to carry out their plan. Margot needs people she can trust and choose an unlikely ally.