Zhao Tiezhu is reborn back to the eve of the great drought in 1976, determined to make up for the regrets of his past life and protect his parents and younger sister. Relying on his years of accumulated geological knowledge, he discovers an underground river beneath his old family home, securing a glimmer of hope for survival for his entire family. Facing the drought and external obstacles, he does not look out only for himself, but instead helps kind-hearted fellow villagers dig wells to find water, improve the land, plant drought-resistant crops, and get through the hard times together. After the disaster eases, Zhao Tiezhu seizes the opportunities of the times, starting out by running a fresh fish business, contracting barren mountains to plant fruit trees, and setting up a canned food workshop, leading the villagers to increase their income and achieve prosperity.