Since Lee Sun-Sim began to work at Cheongil Electronics, she has worked hard as a clerk. She does pretty much any small tasks that the company needs, but her co-workers still calls her "Miss Lee" rather than by her full name. She has a bright and positive personality. Suddenly, Lee Sun-Sim becomes the CEO of Cheongil Electronics, which is about to go bankrupt. With the help of Yoo Jin-Wook and guided by her leadership with humility principles, Lee Sun-Sim tries to turn around the company. Yoo Jin-Wook is a department head at Cheongil Electronics. He is focused only on work and doesn't see the employees as people, but watching Lee Sun-Sim causes him to change and he helps her grow as a CEO.