Yan Hui, a paranoid orphan girl, believed in the fairy tale "The Happy Prince" and transformed into a "fallen angel" to weave a network of lies to rob the rich and give to the poor. However, in the gray kingdom built by manipulating drug addicts, prostitutes and disabled people, she was reduced from a savior to an executioner. When the "Happy Prince" takes off his gemstone eyes, what he sees is no longer suffering, but his own cold heart made of lead - this crime fable full of philosophical speculation uses "Blood Fairy Tale" to ask the times: What kind of salvation do we need?