If private detective Tatyana Ivanova knew what awaited her, she would never have gone to that casino... One young couple won a quarter of a million dollars at roulette, as it later turned out, with the help of a special device placed under the roulette table. And the next night, another five hundred thousand dollars were stolen from the casino’s accounting safe. Tatyana Ivanova is hired to investigate this double theft. Having found out how the thief infiltrated the accounting department in a cunning and brilliantly simple way, Tatyana realizes that she is faced with a worthy opponent, who will be oh so difficult to beat...