In 2026, a construction site accident suddenly occurred amidst the noise of the urban construction site. Song Gang looked at the steel pipes falling from the height and closed his eyes in despair. When he opened them again, he saw adobe beams covered with old newspapers, and the smell of burnt pine wood was on the tip of his nose. Outside the window, there is the calm blue of Daxinganling in 1966. He sat up suddenly and saw the intact felt boots of the man beside the kang stained with snow foam. Song Gang's mind went blank. Then after a sharp pain, he finally understood everything. After his death, the 38-year-old mysteriously traveled to a man with the same name at the foot of the Daxinganling Mountains.