Bat Girl (Josephine Siao) returns from Singapore to Hong Kong as the singer Barbara to investigate her dad, a trapeze artist’s death. She is orphaned. She stays with her aunt. Her cousin is Sze Wai (Lui Kei), a pulp fiction writer of the superhero, Bat Girl. Encountering injustice, Bat Girl confronts Sze to interrogate about the whereabouts of Wu Wan-Lung (Sek Kin). Bat Girl unites with her friend, Chan Kwong-ying (Lydia Shum). Sze tracks down Bat Girl and is involved in a fight with Lung's mark...