The first NF novel by a famous Polish author . 90 years after the fall of the Tunguska meteorite, a coil of non-terrestrial origin with magnetized wire was discovered in the area of Podkamennaya Tunguska As a result of decryption of records from the discovered coil, it turned out that in 1908 in Eastern Siberia a Venusian ship sent for reconnaissance crashed. In addition, it turned out that the Venusians wanted to destroy humanity and capture the Earth, but the disappearance of the reconnaissance ship may have prevented this. Earthlings are sent to Venus nuclear spacecraft "Cosmocrator" to find out how much really survived this threat.