Lark is a human with eyes that are red like a vampire. He is constantly bullied for his appearance and feels as though he does not belong. Then one day a real vampire child named Setz brings Lark to the other world of vampires where a kind woman called Angela adopts him. Setz continues to visit until his noble father makes him move away to focus on family business.
Years later lark is sent to school where he meets his long lost friend Setz, but politics continue to keep them apart. As he tries to connect, Lark becomes involved in dangerous plots to control the monster world and discovers the secret behind his red eyes.