This story tells about the gentle and kind Gu Eun-jae (played by Jang Seo-hee) who married the rich playboy Jung Joo-bin (played by Byeon Woo-min) and became a virtuous and filial housewife. However, the arrogant and arrogant mother-in-law Baek Mi-rin (played by Keum Bo-ra) despised her for being poor and having no children after seven years of marriage. She worked hard and endured hardships every day. Shen Aili (played by Kim Seo-shin), a vain best friend who grew up in her family, has always been jealous of Eun-jae for marrying a rich husband. She used all means to get Gu Eun-jae's disappointing husband. She used sweet words to coax and provoke the relationship between Eun-jae and her mother-in-law. The mother-in-law, who didn't like Gu Eun-jae, drove her out of the house. Eun-jae, who was deeply hurt, had no hope for the future, but she didn't expect that her husband and bestie would not save her after she fell into the water, which made her find the only reason to live - revenge. After being rescued from the water by Min Gun-woo (Lee Jae-hwang), Eun-chae vows to turn over a new leaf. With the help of Gun-woo's mother Min Hyun-joo (Jung Ae-ri), she transforms into the charming and cool Min Su-ji, and her road to counterattack and revenge begins...