What do we know about the structure of this world?

Southern Gothic
Conspiracy Theory
Mysterious Murders
Detective
December 1984. Overhearing a conversation between neighbors through the wall, Natasha Novikova decided to become a trolleybus driver. The salary was tempting, and the depot employees looked like one big family. At a colleague's birthday party, Natasha learned a secret that would make anyone break out in a cold sweat. There has long been enmity between trolleybus drivers and bus drivers, and the former do not hesitate to occasionally sacrifice the latter. Natasha became a witness to such a sacrifice on that fateful evening. The true scale of the crimes, the network of conspiracies and bribery, was to be established by the principled Captain Nikolai Filimonov, who had come from Moscow for this purpose. Will the main characters withstand the fight against the evil embodied in the sect of trolleybus drivers? And what will it cost them?