After fifteen years as a full-time housewife, Sarah is seen by everyone as a weak woman dependent on a wealthy family. But when her daughter is slapped by her husband's mistress, she finally opens a long-sealed agreement and reveals her true identity: the pharmaceutical company her husband runs was actually founded by her father. In one night, she sheds her meek mask, reclaims her empire, and makes the traitors pay. A mother's fierce counterattack begins.
