On their wedding night, Song Yan promises Xu Tang that they will stay together. The next day, his old friend Lin Wan moves into Xu Tang's marital home with her child, while her mother-in-law rearranges Xu Tang's belongings without permission. Surveillance footage exposes Song Yan's scheme to use the wedding to obtain her family's wealth, while his younger brother secretly joins in the plot. Xu Tang calmly gathers evidence and defends her rights through legal means, protecting everything that belongs to her. She also compassionately arranges a proper home for the innocent child, holding firm to her principles and rationally dismantling every conspiracy.