Lam Wai-lun directs this supernatural crime thriller about Judas (Francis Ng Chun-yu), a psychopathic killer who stalks women born on June 6, 1969 and cuts out their hearts to check whether or not they are agents of Satan. Naturally, the police takes a dim view of this mode of inquiry and summons Christian policewoman Chan Sau-ching (Chingmy Yau Suk-ching) and thuggish gumshoe Mo (Donnie Yen Chi-tan) onto the case. The fact that Chan, who is normally in Internal Affairs, was investigating the mental fitness of her new partner immediately sets the two on the wrong foot. Meanwhile, Judas begins stalking Chan. Exploding vending machines, cascades of blood, and other signs of the apocalypse ensue.