Rosa Wilder is called in to investigate when Betschart, a policeman from the village of Oberwies, is murdered. It seems the victim was trying to settle an argument in the village pub.

Rosa Wilder has identified two suspects in the police officer murder case. The adrift Elias and the craftsman Zingg are involved in a mysterious death. The Räber family is the victim of blackmail.

Dani Raber ignores Strunz's blackmail; Zingg is freed from being a murder suspect but Kagi stays on his trail. Rosa Wilder hopes her sick father agrees to undergo treatment.

The party organised by the Räbers to celebrate the end of the dam project is overshadowed by a tragic accident; Kägi asks Rosa to help him with his investigation; Strunz, who needs money in a hurry, prepares for a kidnapping.

Rosa's son and father have been kidnapped by Strunz. To free them, she'll need to take risks. The accountant Liechti risks going to prison if Strunz is arrested and confesses. The noose is also tightening around.

Elias, the key suspect in the policeman's murder, has vanished without a trace. There follows a manhunt which proves extremely trying for everyone involved. Rosa realises that in Oberwies, nothing is as it seems.