Park Cara is a rigid ruthless woman with double identity. To the world she's known as Park Rex, the southern mafia leader. A man with a stone-cold heart. Cara has kept her true identity as woman hidden. She was doing great until the mysterious nightcrawler, Byun Baekhyun became her personal bodyguard.      

Lee Areum, a young and very beautiful lady, faced with pain and sorrow, had long giving up on life after her baby girl was forcefully taken away from her right after birth. Her existence was filled with sadness, and she shut out the world away completely. But her life took a drastic change when she met the little warrior princess Oh Nari and her lovely Dad Oh Sehun.

Baekhyun is a 26 years old vibrant, wealthy, young man who falls in love with Seoyeon, a 30 years old independent woman who happens to hate men due to her past experience with her ex husband.      

Life has never been fair to Wang Byeol after the death of her parents. She ended up living as a maid to her stepmother and stepsister with so much suffering inflicted on her that she developed Haphephobia. What is the fate of Byeol when her high school arch enemy, Byun Baekhyun turned out to be her stepsister's fiancé?