A mysterious murder leads Eisner to investigate a dangerous cult.

Eisner teams up with a new partner to investigate a series of murders of young people.

A nighttime emergency call from a moving car alerts the police in Carinthia: "Eisner, BKA Vienna, service number 318-12-58. Need support!" A short time later, Lieutenant Colonel Moritz Eisner is found seriously wounded by a shot to the head and motionless behind the wheel of his car in a quarry. When he wakes up in the intensive care unit, he has no idea what has happened. He suffers from "retrograde amnesia", which blocks out the traumatic experience itself. A fatal consequence of the gunshot wound.

Eisner and Fellner investigate the murder of a timber baron.