Fan Yang: "Susu, what do you like most about me?"
The girl showed her pointed fangs: "I think your blood tastes good."
…
Dai Susu was originally the fiancée of a plutocratic heir. After a car accident, he discovered that his body had undergone abnormal changes and turned into a powerful vampire. After escaping from home in a hurry, his fiancé followed suit.
Vampire-related cases occurred frequently in Hongcheng City, and a special case investigation department was established. Captain Fan Yang met the mysterious beauty Dai Susu by chance while investigating the case, and fell in love with her at first sight. He accepted her to work with everyone to solve various unsolved cases, fight against the evil forces in the darkness, and find the real culprit who transformed her.