In Hong Kong, babies are being kidnapped by the Invisible Woman (Michelle Yeoh) for the Evil Master (Yee Kwan Yan), who plans to raise them to become unbeatable warriors. The Invisible Woman's sister, Tung (Anita Mui), married to the police officer investigating the kidnappings, secretly fights crime as Wonder Woman. When the Invisible Woman reconnects with her sister and her childhood friend, Thief Catcher (Maggie Cheung), they convince her to team up with them to defeat the Evil Master.
