Russia, Tver, 2035. The Equality Party, which came to power, under the pretext of ensuring security in the country, introduced global digitalization, total video surveillance, chipping of citizens and social rating. The entire array of information is processed by the artificial intelligence of Caissa, developed by the brilliant scientist Plato of Devon. The hacker Arkat Lee tries to hack Caissa, and he is sent to prison for 25 years. There he comes up with the plot of a fantasy novel about a war between a Demon and a one-armed Angel. But for some unknown reason, these characters are embodied in real people, which means a battle is coming that will turn the whole world upside down...