The scenic and sleepy town of Tichý Brod is shaken by the death of 11-year-old Daniel. Major Adam Hanzel, a distant stranger, and Elena Mikušová, a warm-hearted local captain, take over the investigation. Although their cooperation is extremely difficult for both of them, they quickly discover that the boy died a violent death and the investigation casts a shadow of suspicion over many of the town's inhabitants. In addition, a feisty investigative journalist, Viki, who knows about sensitive information from Adam's past, begins to take an interest in the case.

Thanks to the investigative work of reporter Viki and Oliver, a young and ambitious local intern, the police shift their focus to pensioner Juraj Masár, who had lived in the town for years as a seemingly upstanding citizen. While the collaboration between Viki and Oliver brings them closer together, public opinion begins to turn against Juraj. Frightened by the harsh public reaction, he turns to Adam and Elena, asking them to protect him from the enraged crowd. At that moment, Marek and Barbora's daughter Ema and her boyfriend Denis unexpectedly become involved in the investigation.

Despite Elena’s objections, Adam prioritizes the investigation over his own health—but time is running out for him. Elena puts pressure on Zuzana, who is becoming increasingly suspicious in the eyes of the police. She inexplicably refuses to clarify her role in Daniel’s death or the mysterious connection she has with Marek’s friend Noro. Meanwhile, Marek and Barbora are trying to save their marriage, and the intense investigation is beginning to take a toll on Elena’s relationship with her husband Jozef. Adam’s demons from the past are finally catching up with him.

The conflict between Adam and Elena escalates, as Adam inexplicably focuses the investigation on her son Tomáš—so much so that Elena’s husband Jozef is forced to intervene. Barbora and Marek have lost hope that the police will ever solve their son’s murder and are trying to find a shared perspective on how to move forward with their lives, even though their visions differ greatly. When Adam finally makes a major breakthrough and uncovers the killer’s identity, his revelation deeply shakes the entire town. The truth is simply too cruel—and Tichý Brod will never be the same again.