In her previous life, Zoe Kingsley, the family's eldest legitimate daughter, was driven out by her father's mistress and her daughter after her mother died. They seized the family fortune, and Zoe eventually died on the streets. She is reborn on the day Sena Edwards and her daughter Elise first enter the family home.
Hiding her hatred, Zoe pretends to yield while plotting revenge. She turns their schemes over her room and living allowance against them, protects her mother's old villa, and gradually exposes their false kindness. Knowing her father favors sons and insists on a male heir, she secretly arranges for him to be sterilized to prevent rival heirs from seizing the fortune.
At the baby boy's one-month celebration, Zoe presents a DNA report and exposes Sena's affair with the family doctor, revealing that the child is not her father's. Sena and Elise are disgraced and expelled from the family.
Using her past-life memories and business skills, Zoe joins the family company and gradually takes control, preserving her mother's assets and memories. Sena and Elise's schemes end in ruin, and both die on the streets, completing Zoe's revenge.