When a young, energetic employee joins a public relations firm with an introverted and severely misunderstood boss, she makes it her life’s mission to show the world who he really is.
Eun Hwan Ki is the boss at a public relations company. Even though he is at such a highly-regarded position, Eun Hwan Ki is still really shy. So shy, in fact, that even his employees don't know him that well. When read morethey try to talk to him, he averts his gaze and doesn't say hello, instead preferring to hide in his office and avoid human contact. Eun Hwan Ki is just introverted, but everyone thinks he is a cold, prickly, arrogant grouch. They call him the "Silent Monster" and he is genuinely hurt that they see him that way, but is unable to change himself.
Chae Ro Woon is a recent hire at the same company. She is energetic, bubbly and gladly breaks into dance in the middle of the street. She loves to be the center of attention and always has something to say. This quality of hers, in fact, makes people think she is too opinionated and confrontational. In short, she is the exact opposite of her boss, who she seems to have an old grudge against. And she takes his "rude" behavior as a personal directive. Chae Ro Woon sets her eyes on Eun Hwan Ki and now has one goal in life: expose the big boss man for who he really is and take her revenge.
Eun Yi Soo is a chaebol heiress who has been engaged for three long years. Like the boss, she is also incredibly introverted. However, even though she can be a legitimate celebrity, Eun Yi Soo has no desire to stand out or be the center of attention. The same firm also employs Kang Woo Il, co-boss at the company. He, unlike his partner, is warm, sensitive and well-liked.