Wilsberg's prospective client Britta Mantzke's corpse floats in the Aa lake. Unlike Springer and Overbeck, he dismisses suicide, taking her case posthumously. Sister Frauke Weiß confirms Britta survived a grueling cancer therapy five years ago and had a doted daughter, Amrei, from one of the embryos frozen in the local fertility clinic "Beste Hoffnung GmbH". It's a client of the law firm where Alex successfully postulates, and she dates their clinic chief Dr. Thorsten Friedrichs, whom she dumps as 'too eager'. Ekki is thrown out of second hand cloths NGO for fitting a leather jacket, retaliates by full tax audit and stumbles upon it being a front for arms export. Klutz detective Overbeck suffers an emotional roller-coaster as Alex's teen client Kira Baumgartner demands to meet him as the fertility clinic was legally obliged to disclose him being her biological father, having donated anonymously, but they got on well only to be shocked by a new murder relating to more secrets.
—KGF Vissers