A strange accumulation of deaths leads detective Acham from Klagenfurt to a small town on Lake Ossiach in Carinthia. In order to support the local police, they take over the investigation of the mysterious cases. Among the victims are mainly elderly people in need of help. Many of those who remain are quickly suspicious, but only a DNA trace found brings about an unexpected turnaround, but at the same time draws the detective into a life-threatening situation.