A modern youth accidentally time-travels to become a ten-year-old orphan, Zhou Ningye, and right at the start is beaten to near death by his vicious aunt. After finally waiting for the immortal cultivation system, the system discovers it bound the wrong world, hastily unbinds, and leaves him only a mysterious space and two bottles of elixir. Facing his seven-year-old younger brother, young younger sister, and infant youngest sister, Zhou Ningye has no choice but to shoulder the responsibility of an eldest brother, starting from digging wild vegetables, gathering mushrooms, and selling mountain goods to earn food and support the family little by little. Yet, toxic relatives are still coveting the house and land left by his parents, and even want to sell his sister. While protecting his younger siblings and outsmarting wicked relatives, Zhou Ningye farms and supports the family, accumulates family wealth, and secretly investigates the truth behind his parents' disappearance.