No magic, magic wands and spells! Only ingenuity and ingenuity, Ulyana Karavaeva will need in her unusual, amazing travels! Ulyana Karavaeva seems to be an ordinary fifth grader. But how can the inventor, crotops, rollers with a built-in player and a device for reviving sports equipment be an ordinary girl? Therefore, when her father disappears in a diamond mine, she without hesitation goes in search of him. And, as you know, where there are diamonds, there are all sorts of suspicious personalities. Ulyana will certainly cope with them, and even along the way she will be saved by a mobile circus and a piglet Pomidorchik, but this is just the beginning of an adventure! Daria Vardenburg has been telling for several years in magazines for parents how children can be entertained and captivated. Once she decided to move from words to deeds, and Ulyana Karavaeva, an fidget, inventor and just a good girl, was added to modern book heroes.