Before the failed witness protection mission: Four bodies were buried in a forest near Marnow, the people died in different ways and not at the same time. Elling and Lona are faced with a mystery. Among the bodies are two teenagers, and the trail leads to a nearby children's home, where the Bulgarian orphan Sarah has just been brought, who later becomes the most important witness. Later, Dudek (Bernhard Conrad) and Kaminski have to realize that they cannot trust each other. One of them is playing a double game. A race against time begins: Which of them will find Sarah first?
