Y/N was just a normal girl on an ordinary day, until she heard someone scream for mercy. She followed the voice and saw to much. The Number one Mafia boss, Yeo Hwanwoong, was right in front of Y/N. She just witness a murder, trying to get out of there without being seen didn't work. Y/N happen to be at the wrong place and the wrong time. She is now forced to marry the Cold Mafia known as Hwanwoong.