The TV series "Ikra" is a Russian crime detective story about an honest Soviet investigator's fight against the "caviar mafia". Alexander Kostenko, a member of the OBHSS, tries to find out why his colleague and friend Mikhail Fedorov died. However, he is unexpectedly removed from the case. He goes to Moscow in search of justice, but instead finds new problems. At the airport, he notices a courier carrying a large sum of illegal currency. It turns out that the courier is a government official from the Ministry of Fisheries, and behind him stands an entire mafia.