In Liuxi Village, a widowed mother Lin Qiuniang raises her daughter Xiao He alone. One night, the millennium spiritual serpent Yuelin comes for help, asking her to rescue the young serpent Xiao Qing who was captured by a snake catcher. Not for gold and silver, but because they are both mothers, Lin Qiuniang resolutely helps. Afterwards, greedy people set traps to poison and forge documents, attempting to seize the spiritual serpent. Lin Qiuniang and the villagers join hands to find out the truth and cure the children, and Yuelin also protects the entire village with kindness. After going through misunderstandings and tests, a deep bond is forged between humans and serpents, and Liuxi Village regains its peace.