The mystery of the Putorana Plateau on the Central Siberian Plateau has excited the public. An unknown object, both similar and dissimilar to a UFO, appeared near Vivi Island. The participants of an urgently organized scientific expedition by the military, as well as their equipment, disappeared. Journalists could only guess and make the wildest assumptions. However, the situation turned out to be much more incredible, as the Khromov brothers, Nazar and Leonty, an officer and scientist, were to see... The mysterious object, called DiUFO by scientists, did not reveal the secret of its origin on its first visit to Earth. After some time he appeared again. And messages about incredible events immediately poured in. A US nuclear submarine was transferred from the Arctic to the island of Trinidad, a piece of the island disappeared, several helicopters and a tour group disappeared. Major Khromov has hope of finding his brother, who disappeared along with DiNFO more than a month ago... Will it be possible to find the key to another mind? Will it be possible to prevent a war with a potential enemy who is not averse to taking possession of alien technology?..