In the aftermath of a medical accident, Yin Li must survive by consuming fresh blood every day. He is a loner, aloof, maintaining a distance from everyone, yet he inexplicably doesn't shun Zhou Chunming, who insists on bringing him breakfast daily. Zhou Chunming, in turn, showers him with kindness, which would have remained unchanged had he not one day revealed his fangs. Reborn, Zhou Chunming is determined to remain calm when Yin Li first reveals his fangs and to tell him that she adores his sharp teeth. In her previous life, he was treated as a monster, and she, taken hostage in an unfortunate incident, met with an accident. In his grief, he went on a rampage, causing bloodshed that turned the entire city red. In this life, she is resolute in preventing that tragedy from happening again.