Being kidnapped is one thing. Being taken to the Kingdom of the Underworld, that's another thing. To everyone, Chun-Ae is nobody. If anything, she's an average 17 year old living in the Gangnam-gu. Overlooked by everyone, even her own family, she is used to being a ghost. That was until, Kim Taehyung came to Seoul. Third son of the the Lucifer and youngest out of 2 brothers. Sent by his family, the 147 year old bachelor is on the hunt and has a week to find her... His soulmate, before his brothers do. He has one week to bring her home and redeem his throne by gaining her love and entering the blood contract. One week to take her back to the Kingdom that one day he will rule. But who said bringing a beautiful mortal girl back to a Kingdom was easy?