When a baby is found floating inside a wicker basket on the lake, Oberländer and Zeiler suspect a connection to an older case of a missing woman. The strange symbols painted on the sheets the baby was wrapped in give them their first lead.

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A decaying ship emerges from the depths of Lake Constance, dredging up a tragic, unsolved mystery from fifteen years ago. The eerie discovery compels Detective Oberländer to confront the past and reopen the case.

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When Hoffmann’s past catches up with her, not only is the relationship with Oberländer put to a test, but also the safety of her family is severely threatened.

After a book reading, a successful author of crime novels is found dead in his secluded mansion in the mountains. Detectives Oberländer and Hoffmann suspect that the perpetrator was one of the guests at the event.

Detectives Oberländer and Hoffmann in a race against time to free a kidnapped boy.

A disturbed young woman shows up at the police to report a murder she claims to have seen in a vision. Oberländer believes it to be a hoax, but Zeiler is not letting go of the matter. Few hours later, the man described is found dead.

While Zeiler has still not returned from her vacation, Oberländer has problems getting used to her replacement, the resolute Detective Hoffmann from Vienna. But soon a complicated murder case forces them to cooperate.

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Just as the freediver Victor is about to start a new record attempt, the body of his wife is found in the depths of Lake Constance. Detectives Oberländer and Hoffmann suspect that Victor himself may have been responsible for the drowning of his wife.

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A wolf roaming the woods causes unrest among the population and attracts dubious characters to Lake Constance. When one of them, a trophy hunter, is found dead in his self-made wolf trap, detectives Zeiler and Oberländer are called upon.

Plagued by nightmares and strange visions, Detective Oberländer is suspected of murder.