Henriette is terminally ill with cancer. Since her diagnosis, contact with her sister Gerlinde has fizzled out. It is only when she talks to the open-minded pastor Linus Gobert that she begins to accept her fate and gets closer to her sister again. But before she can tell Gerlinde about her illness, she is shot dead in the street. Gerlinde, the only witness to the crime, doubts that it was a robbery.

Starnberg. An idyll with fangs. This is where police master trainee Ariane from Dortmund ends up. Inspector Lu takes her firmly under his wing. Her first cases are typical and strange: the Kini is found dead in the lake - again. And then Sisi is kidnapped.