The shadow of Black Arachne fell on planet Earth. Attracted by the ecology that has not yet been completely destroyed by man, an expedition of arachnids arrives in the Solar System from the distant constellation Centaurus. Its task is to prepare favorable conditions for the total expansion of the Brilliant Empire and the complete destruction of the human race. Having not received support from the earthly arachnids, the star arachnids are forced to rely on traitors from among Homo Sapiens, using some features of their birth for recruitment. A secret struggle is unfolding on the territory of all continents to subjugate the consciousness of people to aliens and form a “fifth column”. Zombification, blackmail, and the destruction of unwanted people are used. Three twins find themselves in the thick of dramatic events. The future of the entire race depends on their adherence to the traditional values of human civilization. In the fantasy novel “Under the Sign of the Black Arachne” by Vitaly and Tatyana Sarazhin, good and evil again enter into mortal combat, putting the fate of all humanity at stake.