Xun Ya, an exiled god turned oracle, ferries souls across the Luochuan River. After saving the Green Snake from a fatal lightning strike, he builds the Sansheng Inn and creates Zhe Sheng as a companion. For three hundred years, they live peacefully caring for passing souls. When a destructive demon threatens their world, Green Snake courageously decides to fight and protect her loved ones, risking everything to defend her home.