Chaewon was born from a miracle, a hybrid between a vampire from an ancient bloodline and a werewolf from the Bloodmoon pack, and so was Minju a daughter of a Warlock with a blurry history.    They were never meant to be together just like how they were never meant to exist. Yet a certain bond pulls their hearts close but with a heavy price to pay.

Kim Minju the Hospital Director of Pyeonghwha Hospital yet a struggling family member meets Kim Chaewon a North Korean spy turned military captain. 

"What's a soulmate?" "Well, it's like a best friend but more."  

Witnessing your own annoying bestfriend fall for every person would irritate anyone. What more if you're actually in love with your own bestfriend and they do fall in love with every person but you?  This is how the pretty girl Jang Wonyoung feels for the annoying bully Ahn Yujin.