Inger Johanne is getting closer to the murderer, and is convinced that the key to how it all fits together is under a layer of black paint. Marcus Ståhl gets to a point where he can't lie anymore and when the truth gets out it will have dire consequences for many.

In the season finale, Inger Johanne and Ingvar have a clear picture of the murderer and the motive, but disagree on the next step. There is one final victim, but the question is, who? Stina makes a decision that places her and her sister in danger.

Four years after Inger Johanne Vik lived her life in Washington, working for the FBI, we find out the reasons she came back to Sweden. But will it stay in the past? Helen Tyler, the president of the United States comes for a state visit and unpredictical events happen.