Norah tries to put the mysterious events around her in order - unaware that her every step is being monitored. At least she seems to be getting closer and closer to the sender of the anonymous messages: Thanks to Werner's help, Norah is now certain that the unknown number is Grimm's ex-girlfriend Emma Mertens. She has to find them in order to get answers from her about the Grimm cause. But before Norah can follow this lead, Gruber tells her an unpleasant truth about Emil, which causes quite a stir in the office and puts her in trouble to explain herself to Balder. The once hated artist is increasingly becoming an important reference person for Norah and always manages to lure her out of her reserve and look into the furthest corners of her soul.

It's August 13th. Norah confronts Arthur Grimm at the Prater. She's ready for anything. But although Norah thinks she has it all figured out, things turn out completely differently than expected. Norah is on the run. In addition to the police, Emma and her office are also desperately searching for Norah's whereabouts. Norah is now certain that Grimm is to blame for Valerie's death and must be held accountable. But nobody wants to believe her.