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 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.