Li Xiangdong is reborn in 1979. In his previous life, he accomplished nothing, leeching off his parents and kids while relying on his wife. In this life, he becomes a train water supplier, nicknamed "Li the Waterman." While traveling across the country, he earns money by trading goods on the side. When others are still worrying about making a living, he’s already enjoying a leisurely life with his wife and kids, warm and cozy at home.