Birth of a Beauty follows the story of Sa Geum-ran, an overweight and mistreated housewife who discovers her husband is having an affair and planning to leave her. After a near-death experience, she undergoes a life-altering full-body plastic surgery and weight loss transformation, emerging as the stunningly beautiful Sara. With the help of Han Tae-hee, a wealthy heir who is desperate to win back his own lost love, Sara begins a complex plan of revenge against her husband and the people who betrayed her. As the plot unfolds, Sara and Tae-hee find themselves entangled in a web of corporate greed, family secrets, and unexpected romance. While Sara initially seeks only to reclaim her life and punish those who wronged her, she must navigate the challenges of her new identity and the realization that her past life was defined by more than just her appearance. The series explores themes of inner beauty, societal standards, and the true meaning of self-worth.