Na Ae Ra grew up thinking she was meant to be pretty, not smart. While working at her family’s restaurant, she falls for Cha Jung Woo, a nerdy engineering student preparing for civil service. Dreaming of becoming a housewife, she marries him after he promises a stable future. But on their 100th day of marriage, Jung Woo quits his job to chase a startup dream. As his businesses fail, Ae Ra works multiple jobs to support them, eventually suffering a miscarriage from the stress. After four years of hardship, she divorces him. Three years later, Ae Ra is still drowning in debt—only to find Jung Woo now rich and successful. The real fun begins when she plots revenge, and he mistakenly believes she wants him back because of his wealth.