Nothing will come of the well-deserved weekend at Schmitz. There is a dispute at the breakfast table because granddaughter Emiliana's new friend Mathis absolutely wants to live vegan – too much for the professing meat eater Klaus. And then he is called to the organic laboratory for use, because there is a dead man between all the living bacterial cultures. Ellen Lindner, the manager of the laboratory, discovered the tied up and gagged security guard. Large amounts of hormonal drugs are also missing. Forensic doctor Dr. Lara Krüger finds suffocation as the cause of death. Did the security guard catch the thief in flagranti? Schmitz and Bielefelder want to know exactly: What do you want with so many hormones? Emiliana has a tip here, because there seem to be groups that want to achieve male infertility by adding hormones in drinking water.
Your goal: to save the environment by exterminating humanity. Digital specialist Hui Ko does not torch for long and researches two clubs that deal with this topic. The „ Rentnercops " take a close look at the members Mette and Tino, but their research is ineffective …