The heirs of a brewery, Sybille and Sebastian Heinrich, are extorted. The new “in” beer “Funky-Lemon” is poisoned. Detective Heldt and superintendent Grün investigate. The new drink was supposed to become the ideal “in” beer accompanied by a huge marketing campaign. Now, prosecutor Bannenberg has immediately stopped the production. Heldt and Grün learn that Sybille and Heinrich made themselves very unpopular due to their different management style, their innovative ideas and savings. “Funky-Lemon” was not allowed to be sold or consumed before the starting shot, but the “Carlo’s” did not follow the restriction, and so, Mario was able to steal one bottle and gave it to his mother. As a result, she has to be admitted to the hospital.