An open door becomes a deadly threat for Sebastian. Behind this door, a brutal murder has taken place, and the remorseless killer knows that Sebastian is at the crime scene and that he is leaving many traces. Sebastian must find the murderer to prove his innocence. Commissioner Schwemmer and his team are faced with a complicated case, and the discovery of another dead body in Murnau does not make things any easier. The Devil of Garmisch has left many false leads.