Twins' self-training and the minefield crossing
During the war, twin boys are left by their mother with their illiterate, abusive grandmother in a small town on a guarded border. They systematically harden themselves by beating each other, fasting, staying motionless for hours, and practicing begging and cruelty. The novel ends when their father arrives and tries to cross the minefield into the next country. He is killed by a mine, and one twin crosses safely by stepping in his footprints and over his body, while the other returns to the grandmother's house.