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 PR company. He is really shy. So shy that even his employees don't know him that well. He prefers to hide in his office. Everyone thinks he is a cold, prickly, arrogant grouch. They call him the "Silent Monster". Chae Ro Woon is a recent hire at the same company. She is energetic, bubbly, loves to be the center of attention and always has something to say. The exact opposite of her boss, who she seems to have an old grudge against. Her goal in life is: to expose the big boss man for who he really is and take her revenge. The same company also employs Kang Woo Il, co-boss at the company. He, unlike his partner, is warm, sensitive and well-liked. Eun Yi Soo is a chaebol heiress who has been engaged for three long years....

Regardless of the opposition of her parents, Yin Susu eloped to Europe with her senior boyfriend in college. Unfortunately, this relationship did not reach the end and Yin Susu and her senior parted ways. In a strange foreign country, Yin Susu must begin to learn how to support herself with her own hands, so she became a tour guide. Shan Malu has a girlfriend who has been in love with for many years. Although the relationship between the two is very good, it is inevitable to encounter the quarrels in life. This time, Shan Malu quarreled with his girlfriend again, so he chose to embark on a lonely journey to France, and Yin Susu happened to be the tour guide in charge of receiving the tour group he participated in. Under circumstances, the two met each other.…...

Lee Ro Um (Chun Woo Hee) là một kẻ lừa đảo thiên tài, kiếm được bộn tiền nhờ vẻ ngoài xinh đẹp và tài ăn nói khoa trương, nhưng cô lại thiếu khả năng đồng cảm với người khác. Trong khi đó, Han Moo Young (Kim Dong Wook) lại là một luật sư có sự đồng cảm thái quá với mọi người xung quanh, sự vui buồn hay những thương tổn của người khác đều ảnh hưởng sâu sắc đến Moo Young. Một cách tình cờ, hai người trái ngược này lại gặp và hợp tác với nhau vì một mục đích chung: trả thù một thế lực tàn độc....