The Penultimate Truth

What would you do if you discovered that all your knowledge about the world is a lie?

For fifteen years, the Third World War has been ongoing, the air is contaminated with deadly pathogens and toxins. For survival, people had to... descend into underground shelters. Settlers are constructing metal robots — lidi, and they wage war on the surface alongside regular soldiers. Large screens in the bunkers tell residents about the hardships of war and show the ruins of familiar cities. And they believe.
One day in one of the bunkers, a talented designer dies, and his body is immediately frozen, but he can still be saved — it’s just necessary to procure an artiforg, a bionic organ for transplantation, and for that, one must go up top. A bunker resident, Nicholas St. James, decides on a dangerous expedition. But what will he discover? Death or the truth that is being very carefully hidden?