《吸血鬼之花》改编自同名网路连载小说,讲述了为了成为吸血鬼之王不断寻找吸血鬼之花,时隔500年重返人类世界的红眼吸血鬼路易(在亨 饰)与和吸血鬼有著契约关系的人类女孩瑞英(金佳恩 饰)之间的罗曼史。Louis is a centuries old vampire who appears to be a teenager. He has fallen in love with Seo-young, a high school student with extraordinary blood. Together, they trek through the land of the vampires to retrieve a long lost flower.