Location - Russia. Time – future. Most of the world's population died in result of a global catastrophe. The reasons are unknown. Only young and strong survived, but for their right to live they had to pay with their memory. They forgot everything about their former life, retaining only the most primitive skills. Time passed, some people regained their memory partially, and from now on all their aspirations are aimed at reviving, at least partially, the lost way of life. But along the way, they are facing very serious opposition. Some unknown force mercilessly destroys the restored fragments of the former greatness: bridges, power plants, factories and large settlements. When one of the settlements is being attacked, the main character Gosh and his friends undertake an expedition to the mythical Bunker. They are ready either to die in battle with an unknown danger, or to get rid of the threat hanging over humanity once and for all. However, having overcome all the hardships on the dangerous path and reaching the goal, they understand that there is no simple solution to the problem. Whatever choice they make, the fate of humanity will change irrevocably, and the world will never be the same.