Can you actually not show what your true colors are while working with a lot of people? Eun Hwan Ki, the director of the top public relations agency, is a mysterious man known as “The Silent Monster.” No one knows much about him because he always avoids eye contact and appears coldly aloof and arrogant, but in truth he’s an extreme introvert — a PR executive who hates attention and is too shy to be around people. Chae Ro Woon begins to work at Eun Hwan Ki’s company. She is very energetic, the extroverted type and receives recognition for her work, but her only interest is in CEO Eun Hwan Ki. She plans to reveal who Eun Hwan-Ki really is.

University students Yoon Jin-Myung, Jung Ye-Eun, Song Ji-Won, Kang Yi-Na and Yoo Eun-Jae share a house. Jin-Myung is busy supporting herself financially and studying. She suffers from lack of sleep. Ye-Eun is devoted to her boyfriend, she is clear about what she likes or not. Ji-Won has a bright personality and likes to drink. Yi-Na is popular due to her beautiful appearance. Eun-Jae is timid, but she has an unique taste for men.

A man is worked to death, but he comes back to the living world in the attractive body of another man for a limited amount of time. Lee Hae Joon is a perfect man with good looking appearance. He works as a section chief in the women’s apparel section at a department store. His body is actually possessed by the spirit of Kim Young Soo who was worked to death. Meanwhile, Hong Nan is a beautiful woman, but her spirit is possessed by a tough guy, Han Ki Tak. At the same time, Shin Da Hye is a beautiful housewife, but her husband suddenly dies. She falls into a love triangle with Lee Hae Joon and a promising store employee Jung Ji Hoon.