The story of a vampire and a killer.
Ling Chen is a killer lurking in Shengye College. Unexpectedly, he gets acquainted with the vampire Lan Shi.
He said we were attracted to each other because of the same bloodlust.
During a mission, Ling Chen was seriously injured. Lan Shi formed a blood contract with her and used the power of a vampire to save her life.
From then on, she had an omnipotent vampire servant by her side.