Now that former German Chancellor Angela Merkel has been retired for some time, she has moved with her husband Joachim Sauer to a small town in the Uckermark region. However, she is having trouble adjusting to the tranquil life in the countryside after the stressful political routine in Berlin. Baron Philip von Baugenwitz is found poisoned in a castle dungeon that is locked from the inside. Merkel suspects that it was not a suicide and takes up the investigation herself.