Working in one of the currency bars in Yalta, Mikhail squandered a huge amount of money, caring for the sexy blonde Galina. To pay off his debts, he and his friend Alik decide to rob an apartment in Moscow, where there are seventeen twenty-carat diamonds worth several million dollars in a private collection. The investigation of the robbery with murder is entrusted to investigator Yuri Zheleznikov, who must find the "Shah's Diamonds" taken out of the country by criminals.