While investigating a murder case, prosecutor Halima Bazieva receives from a bandit nicknamed Black a cassette tape exposing the machinations of local mafiosi operating in the city. The mafia has its own people everywhere - from law enforcement agencies to the highest echelons of power. The forces in this mortal battle are too unequal...

Young investigator leads cases related to drug trafficking, while his boss, connected to the underworld, seeks his arrest.