Zhou Dashan, a modern agricultural technician, transmigrates into the body of a sick fifty-year-old man living through a famine in ancient times. All four of the original body's sons have died in battle, leaving behind four young daughters-in-law who are about to be sent to a military camp to repay a debt. On the day he awakens, Zhou Dashan cuts their ropes with a knife and publicly accepts a deadly deadline: he must repay the grain debt in full within thirty days. Just when the Zhou family cannot even afford a single meal, he awakens a famine-survival intelligence system. The system provides only one survival tip each day, while food, game, and the family fortune must still be earned through their own efforts. Starting with 180 jin of wild Chinese yams, Zhou Dashan leads his four daughters-in-law into the mountains to forage, dig wells, repair irrigation channels, reclaim wasteland, and raise chickens and rabbits.