Kai can't live with his guilt and wants to shoot himself. Maggie saves him at the last second. She wants to give her brother the chance to work together to find those behind the unimaginable acts and to make amends for something like that. In order to stop the series of crimes, the ex-policewoman goes in search of the key figure: the "Great Hunter". A trail leads to 1947. At that time, two men were suspected of having committed gruesome murders. One of the suspects was Maggie's now over 90-year-old father Arthur, the other disappeared a long time ago. Together with Roland, Maggie uncovers a disturbing family secret.