Lee Young-Joon’s family runs a large company, and he works there as the company’s vice-president. He is an intelligent, wealthy and handsome second-generation chaebol, but he is arrogant due to his extreme narcissism. His secretary is Kim Mi-So. Kim Mi-So has worked for him for nine years through thick and thin, serving as his personal assistant and doing everything from managing his schedule to acting as his driver. She is an assistant who knows her boss’s next move before he makes it, and is essentially the behind-the-scenes problem-solver who sorts everything out, no matter how serious the crisis. She is known as a 'legend" in the world of secretaries and would even get her hands dirty for her job. She is talented and beautiful, but has never been in a relationship before.