Your millionaire, douchy, ex-boyfriend is getting married in two weeks. After what he had put you through, you can't afford to show up by yourself to his wedding. You can't show him that you're still single and miserable to this day. So, you made a deal with the annoying new guy next door, Lucas Wong. 

Go Yeonju was a twenty-year-old college student living a mundane life in Seoul. Her life turned upside down when a group of supernaturals knocked her out and held her captive for two days. Yeonju was able to set herself free, and she was running for dear life. Just when she thought luck was on her side, she got herself into deeper trouble when she accidentally bumped into another supernatural being who turned out to be their arch-nemesis. Without knowing, she just started a war.