Due to a random string of bad luck, Yujeong Choi, an ordinary college student, owes $100,000 dollars to the owner of a cafe called, “Delicious Blood.” Daniel Lee, the handsome and flirty cafe owner, just happens to be in need of hired help. Ever the madman, he offers Yujeong a part-time job at his cafe to pay off her debts... and a place to live?! Yujeong has questions, and rightly so. For starters, Mr. Lee’s whole life seems shrouded in secrecy... and this deal is just too good to be true! Will he let her off the hook, or will Yujeong stay indebted for life??