Lee Donghae is a 23 years old successful young CEO of big company in Korea. He is handsome and wealthy. Every man dreams to be as successful as him, every woman dreams to be his girlfriend. But his life is not that perfect like everyone thought it was. He has bitterness and pain that makes him hate woman.
When on the other side Im Yoona, 21 years old. Her habit is.. Working and makes people happy. Everyone like her.. But she thought that she don't need a man in her life because of her past.

How if this two people that have different painful past met?