Hwang Ji An is the top shoe designer in a major shoe company. She is in her 30s, successful and single. One night, she makes a horrible mistake and sleeps with Park Tae Gang, a good-looking new employee in her company, and she finds out she is pregnant. Ji An's hard-earned career and her stylish lifestyle threatens to implode as a result of her one-night-stand mistake. Will Ji An be forced to give up everything and live with the consequences of her mistake?