Tod in der Lochmatt.

Police investigator Bettina Käser is investigating the murder of Gottfried Rösli in Langenthal. His daughter Käthi Güdel found the old farmer dead at the Lochmatthof farm, shot with a pellet gun. Everything points to Käthi's husband Sämi having lost his temper: he had been in a nasty argument with his father-in-law. But Bettina Käser has her doubts about Sämi's guilt. Together with her Zurich-based assistant Roberto Egger, the investigator sets out to find the perpetrator. However, the revelation of the truth holds a surprise in store for Bettina Käser herself.