Modern young man Li Mo transmigrates to an ancient era suffering from a severe drought. With just half a bottle of mineral water, he saves a bone dragon that has been sealed for three hundred years, gaining numerous supernatural abilities, including water manipulation, clairvoyance, and beast taming. He saves the people of Liulin Village and repeatedly confronts local bullies and corrupt gentry. Along the way, he searches for spiritual medicines and fragments of divine artifacts, while resolving a plague and a crisis caused by waves of displaced refugees. On the night of the full moon, Li Mo and the bone dragon forge a protective pact and shatter the chains binding the Drought Demon, bringing down heavenly rain and finally ending the drought. In the end, Li Mo stays in the village, accompanies Yun Niang, a mute young woman, and leads everyone in rebuilding their home.