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.

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.

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.