The discovery of two homeless men tortured to death in an abandoned garden shed puts the operatives under great pressure. The high level of aggression means only one thing - they are looking for a human beast. And the closer they get to it, the more brutally murdered victims it leaves behind.

A selective school is shaken by the murder of a young teacher right in her office. Captain Ledecký manages to connect her to other cases of similarly stabbed women. While the operatives gradually uncover the identity of the serial killer, Second Lieutenant Korec learns that the next victim may be his own girlfriend.

A car with a dead man on it burns over the city, and Captain Machrák discovers that his best childhood friend is missing. To find out the truth, he must unravel a complex case that revolves around a VAT refund. The solution to the case ultimately depends on a risky action - the killers must put their agent in prison to extract information from the mafia about the whereabouts of the main witness.