Claire Zhang, a wealthy heiress, willingly gives up her privileged life to marry a poor man. She endures hardship in his humble home, but faces a cruel mother-in-law, Mrs. Davies, who insists on giving her bizarre folk remedies, including rat soup, during her pregnancy, landing Claire Zhang in the hospital. Mrs. Davies shows no remorse and even encourages her son to cheat on Claire Zhang. Stress leads to premature labor, and Claire Zhang's mother takes her and the baby home, where Claire Zhang begins her revenge.