Twenty years after a devastating terrorist attack in 1983 that halted the course of Poland's liberation and the subsequent downfall of the Soviet Union, an idealistic law student Kajetan and a disgraced police investigator Anatol stumble upon a conspiracy that has kept the Iron Curtain standing and Poland living under a repressive police state.

Lulek, a hit man, is released from prison and given an offer he can't refuse by the man who put him away. If he kills the chief of the Central Bureau of Investigations, he will earn a huge sum of money and have his record cleared so he can leave.

The dark world of crime: murders, racketeering, drugs, kidnappings. There are no rules here. Working in this world makes cops cynical and ruthless. There is a fine line between them and criminals - will any of them cross it? The main characters are officers from the Department for Counteracting Criminal Terror and Homicides. The action of the series is an extension of the threads that appear in the feature film. It presents in a realistic way the brutal and dark world of crime that officers encounter on a daily basis. They're not just tracking down murderers. They fight racketeering, kidnapping, drug trafficking while struggling with their own day to day life and problems.