In the new reality, electricity is forbidden because it opens the door to beings from another world. But the former Moscow managed to maintain its former greatness. Sandr, the new ruler of the city, who dreams of reviving civilization, has built a large laboratory where talented scientists work. Here Artyom also finds a job, who is flattered by Sandra's favor. Now he and Kaya have a roof over their heads and the protection of the city walls ... But sometimes this security seems imaginary. Kaya senses a catch in everything that is happening. Alone against the whole city, she is trying to figure out what the dark basements of the laboratory hide in themselves. Kaya does not even suspect how close she is to unraveling a terrible secret...