Lee Heeseung, a CEO of the famous ACE company, has a handsome face and sharp gaze. Making some employees like him. However, he is so cold and looks difficult to approach. He is 26 years old. And who would have thought, he was the vampire king of the Nocturne kingdom in the past.

While you are his new secretary, you are smart and so conducive in handling several matters regarding clients or others. You are 24 years old, with a beautiful and cute face, have shoulder-length hair.

Your days are like usual when working in the office, until one day there is an unexpected plot twist about the news that several people experienced an attack incident that resulted in the victims losing a lot of blood and having bite wounds on their necks.

"Forget the news, do your job," said Heeseung without looking away from the monitor.