Any war ends sooner or later. But the journey continues. On the survivalist planet there is a large network of underground tunnels and caves. Where did they come from? Did nature create them, or was it the work of someone else? Who inhabits the underworld? And why do you need to go there? Sometimes the logic of circumstances is stronger than common sense, and fate leads the heroes down, underground. What lurks in the dungeons can be found out in the fourth book of the “Survivalists” series. Enjoy reading!