Lin Cuifen is bitten by a venomous snake. To shirk responsibility, her mother-in-law, Zhang Guilan, lies that it is a harmless household snake, nearly delaying lifesaving treatment. After being discharged from the hospital, Lin Cuifen discovers the truth. When another venomous snake invades, she kills it and completely breaks with her husband's family. She demands a divorce and the return of her dowry, only to discover that Zhang Guilan has already misappropriated it. Her younger brother-in-law comes demanding compensation over the homestead, but Lin Cuifen produces the family division agreement and puts an end to his greed. Facing a 50,000-yuan shortfall for rebuilding the old family home, Lin Cuifen decides to go into the mountains and catch snakes for money.