Maren Hilbert is the new teacher at the private elite school Sophienbund. She soon realizes that the school, which looks so perfect on the outside, is in a pretty bad state on the inside. When a killing spree is announced, Maren knows she has to act. But neither the principal nor her colleagues take the threatening emails or Maren seriously, only police officer Niklas Götz (39), the father of one of her pupils, supports her in her research. Maren is certain: the potential killer is a boy from her class and he is serious. A race against time begins.

Art expert Katharina Diezmann is out of the blue, when one day the little Brazilian Marcia is standing at her door. Years ago Katharina had taken over a sponsorship for the eleven-year-old, but never expected that she would ever meet her. The little girl is in Berlin with her samba group over Christmas and has only one wish: finally to see real snow!

Mia and Tim have been together forever. At least it feels like that. Seeking that which has become lost over the years, they invent a game - they each have to help the other one fulfill their dearest desire. No matter what it is.

A kidnapped musician and his missing violin are the prelude to a series of murders whose victims were deeply involved in business connections between the GDR and Austria. The investigators of SOKO Vienna and Leipzig are working together.