A criminally insane scientist, Ryuichi Sakamoto (Lam Chung), transfers his mind into a cyborg and immediately commits a series of rapes and murders. Among his victims is female police officer Selena Lam (Chikako Aoyama). The scientist Dr. Sara (Hiu-Dan Hui) transfers Selena's brain into a cyborg named Eve-27, then copies her own persona into a robotic assistant named Ann (Amy Yip). The cyborg-robot team pursue the criminal Sakamoto by investigating a series of murdered prostitutes.