Hans Siegenthaler is firmly convinced that Bernadette Schanz stabbed his daughter to death out of jealousy. However, the woman was acquitted in a criminal trial. When Schanz and her husband Beat are shot with Siegenthaler's rifle, the man comes under suspicion. Instead of trusting the justice system, he goes into hiding, making himself even more suspicious. Borchert and Dominique believe in his innocence and want to help him.