Again and again, the adventures continue of the former physics teacher Ivan Yakovlevich Brekht, who ended up in the body of a young guy from a small village near Omsk. 1932 year. In the third book, Brekht gradually begins to train his battalion, preparing it for the incident with Japan on Lake Khasan. The Japanese and Chinese regularly stage provocations on the border. And then everything goes off plan. The Japanese wounded the commanding officer of the OKDVA headquarters, Kirill Afanasyevich Merezky, on Pulomyotnaya Gora hill—and he orders Brekht to organize a worthy response.