Famous in narrow circles, top-class swindlers Lenya Marquis and his charming assistant Lola do not sit still. A new task found them on its own, and, at first glance, a completely nonsense one - to find and hand over to the owner a very ordinary notebook. But if only the Marquis knew where he was involved! A competing firm of swindlers intervened in the matter and managed to deceive Lenya himself. It's even hard to believe! Now Leni has purely personal interests at stake, because protecting a business reputation is much more difficult than finding a damn notebook with all its mysterious contents... The book was also published under the title “The Gilded Key.”