The beggar's death raises more questions for Norah. When the body was found, she suddenly received a message from an unknown number warning her about Arthur Grimm. "Arthur Grimm is dangerous!" is the ominous message. But the mysterious sender does not identify himself. Together with her neighbor Theresa, Norah ponders who the message could be from and who Arthur Grimm is. But both of them can't figure it out. As expected, Norah's work on the Balder portrait is complicated. At a vernissage, Norah even clashed loudly with the artist. After all, Norah gets along better with her colleague Emil after initial difficulties. If Emil had his way, the collegial relationship could develop into something more.

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.