Vampires are creatures hiding in the darkness. They feed on human blood, enjoy playing with humans, and enhance their strength by devouring their companions...
Ding Luchen, an LV3 prosecutor who studies at Linlang Middle School, has poor academic performance and is often too happy.
Wanting to avenge his father who was killed by a vampire, he joined "VPCO" (Remove the vampire procuratorial organization, namely: Vampire Prosecution and Elimination Organization). However, he was unable to deal with vampires who had killed humans, so he was assigned to patrol area 05, which has never seen a B-class vampire.
Ding Luchen was also happy until he met an S-class female vampire: Li Mengru.
Everything has changed...