In a small town like Vlčice, almost everyone knows where things are happening, but the twins Klára and Gábina know it to the letter. In addition, they really like to poke their nose into everything. David Holzman, a former policeman who has set up a profitable private detective agency in a nearby county town, is particularly unhappy about this. Gábina's fiance Jaroslav, a renowned lawyer, is planning a wedding, but Gábina keeps postponing it under various pretexts. Klára is dating the doctor Miloš, but he can't help but see that he still has a crush on her, even after all those years when he and his sister threw sticks under his feet during the investigation, David thinks. And on top of that, their half-sister Kamila worries them. She has been living with Matěj and his little daughter Aurinka for some time, but due to the vision of easy profit of considerable money, she gets involved in dirty business and blackmail. And not only her life will be at stake, but also those closest to her...