Forensic scientist Dr. Viktoria Wex travels from Berlin to Pasym, a sleepy little town in the middle of the Masurian Lake District. There she has to prepare for a painful farewell: her uncle Fryderyk, whom Victoria has admired as a surrogate father and mentor since childhood, has been missing for days. A farewell letter to Viktoria suggests his suicide. When she finds an unknown dead man in the basement of Fryderyk's house, the family affair develops into a criminal case. What for the village doctor Dr. Baronowski looks after an accident, Viktoria appears suspicious. She realizes that the body of Antoni Trudzinski, an unscrupulous investor, has been expertly tampered with to conceal the time and cause of death!

A recently eviscerated bison is found in the forests of Masuria, apparently trapped by skilled poachers. Forensic scientist Dr. Viktoria Wex, who is actually on the way to the train station with the village policeman Leon Pawlak, makes another terrible discovery during the stopover at the site: the body of the shot game warden Glinski, which lies near the carcass! For Viktoria, this is a crime scene that grabs her forensic ambition. What happened here about two hours ago? She decides: your return to Berlin can wait! Although the specialist from Germany lacks any police powers, Leon is just as uninterested in that as inspector Kowalska's instructions to stay away from her work.

For Dr Viktoria Wex, the psyche consists of explainable chemical processes. So the forensic scientist doesn't think much of prophetic nightmares. When her impending murder is predicted, Viktoria sees little need for action.

Cyber ​​entrepreneur Maslowski is shot dead in his bungalow. "Zero Trust," the victim's business tenet. Dr. Viktoria Wex, the forensic scientist, prefers to rely on forensic methods instead of people. When she clearly identifies the pistol of her neighbour and friend Leon Pawlak as the murder weapon, Viktoria has no doubts about the shocking KTU result. Leon, who protests his innocence, is now caught up in a maelstrom of suspicions. Even his ex-wife, Commissioner Kowalska, is finding it increasingly difficult to have him investigated.