Soojin and Soeun are two people living very different states of life. Soojin was a well-cared for daughter of a police chief and university professor. Soeun was the step child of an alcoholic whose rage cause her a great deal of pain. Unknowingly, Soojin would feel whatever Soeun would feel. She would have bruises that Soeun had endured. The only thing these two had in common was that they were both completely color blind, seeing the world in black and white hues. This was known as the mark of the soulmate, a curse or a gift depending on who has it.