"Oh My Venus" is a series about the relationship between an ordinary man and a woman in their thirties. Kang Joo Eun was the most beautiful girl in town with hordes of fans in her youth. As the grown-up heroine became a successful lawyer, she gained a lot of weight. Now, no one believes her stories of past popularity, and her long-time lover has even cheated on her with his ex-girlfriend. One day, she accidentally meets a popular trainer and asks him to help her regain her former shape.