Rosa Wilder is hard on the heels of a serial rapist and finally manages to resolve a triple murder. The crimes from the past are also connected to it. The revelations about the Thallingen tragedy are devastating news for the local families.

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.

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.

The noose tightens around Mott, driving him to a desperate act. Rosa reveals to Manfred Kägi that he's her son's father. A clue leads them to a serial rapist's trail. Could this person be behind the triple murder?

Charles Mulliger is arrested, and Susann uses a ruse to get the arsonist to talk. Rosa and Kägi arrest a suspected serial rapist, who makes a confession.

Aeby says she met the supposed serial killer a few years ago. During this meeting, Aeby discussed the cases about Volker, Schellenberg and Engler with him.

Rosa Wilder drives with prosecutor Mettler to the place where another body has been found. Mettler gets anxious when forensic experts discover fingerprints.

The murder of Armon Todt and the kidnapping of the daughter of the billionaire Al-Baroudi cause fear and suspicion in Oberwies to reach fever pitch. The tension is palpable as each villager seems to have something to hide.

Rosa Wilder has returned to Oberwies, the village where she was born in the Swiss Alps. As a major building project is being planned to bring life back the little mountain community, a murder throws everything in question.

The bodyguard is under suspicion by the investigative team, and Kägi and Wilder find a way to lure him into a trap. Meanwhile, the apprentice cook, Jakob Siegenthaler, has also drawn police attention.

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 brutal cop Volker caused the death of Soufiane Hamid, who fell from the balcony during a raid. Five years later, officer Volker dies in the same way as Soufiane, but it is suspected that someone apparently assisted Volker.

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.

An explanation for the landslide is found in Oberwies. An agreement on hush money and a distorted photograph on a mobile phone prompt a resumption of the investigation.