After the death of his parents, Heinrich reunites with his sister Susanne in the abandoned childhood home. But his childhood guilt floats through the silent rooms of the house, and the prospect for reconciliation is remote.
The director of an elite boarding school is set on fire in his own bed and dies. Haller investigates covertly as the new music teacher.
This time, the Graz detective Sandra Mohr and her supervisor Sascha Bergmann have to go to the remote Mürztal to solve a bizarre death with the jovial local police officer Ferdinand Franz: The entrepreneur Walter Fürst is dead in his own bed – with strangulation marks on his neck.
It's been five years Martin's family vanished without a trace from a cruise ship. Ever since, the police psychologist is tortured by the thought of his wife having committed a murder-suicide, taking their son with her. He is the only one not willing to believe this. Suddenly, a new lead takes him back aboard the very same luxury cruiser, where once again, a mother and her child have vanished. But this time, the girl reappears - holding a teddy bear that used to belong to Martin's son. Martin soon learns that things are handled differently on the open sea. Not to disturb his passengers' enjoyment of the lavish luxuries of their cruise, the rich owner of the cruiser wants to keep the child out of sight and hides her deep under deck in the quarantine bay. Here, Martin tries to get the traumatized girl to talk to him. But even deeper in the dark underbelly of the ship there is something lurking. And all signs point to a serial killer, just waiting to strike again.
Madeleine Montana lives in her self-created world and in the fantasy that she is still a famous bestselling author. The taboo-free cynic has a sharp tongue against everyone and everything - including her own son Oliver. When a serial killer terrorizes Vienna, it turns out that the crimes are based on scenarios from Madeleine's books.
The violent death of his girlfriend Kara throws Chief Inspector Haller completely off track. Haller himself went blind in the incident and was released from duty. However, inconsistencies cause him to investigate the murder of Kara on his own.