In a large group, is it possible to hide one's true self from the other people present? The director of the leading public relations firm, Eun Hwan Ki, is an enigmatic figure dubbed "The Silent Monster." Few recognize him since he avoids eye contact and presents himself as coldly aloof and haughty; yet, it turns out he's a PR executive who despises attention and is far too nervous to be around people in any large group setting. A new employee, Chae Ro Woon, is hired by Eun Hwan Ki's company. Even though she's a high-energy extrovert who gets a lot of credit for her work, CEO Eun Hwan Ki is the only one she really cares about. She intends to reveal the identity of Eun Hwan-Ki.