An expedition from Russia in the 21st century penetrated into the past through a “hole” measuring one meter by one meter. The "hole" has closed. Robinsonade has begun. Got it! The story of achieving full food autonomy of the expedition. Description of extreme methods of organizing food for a large group during a sudden cut in supply from outside, in comparison with the experience of the siege of Leningrad. On pasture and homemade technologies, a crowd of modern city dwellers must survive the Siberian winter in complete isolation from the world. Chemistry, greenhouse and mushroom farming, fertilizers, poisons, storage and processing of all this using the simplest methods. Secondly, an analysis of the history of agriculture in Russia, as the northernmost zone of “risk farming” on the planet. Russia is an incredible country. Absolutely everything here is raw material or food. The main thing is to be able to prepare it using improvised means. A look at the events of a biochemist specialist.