Rookie policeman Will Ren and his partner, the veteran cop Cham Lau, are pursuing an obsessive and especially brutal murderer of women. To lure this “hand-fetish” ripper, they use the criminal Wong To, who needs to atone for causing an accident involving Cham’s family, as bait. But this young woman is both unpredictable and insubordinate. Surrounded by ever more insane bouts of violence and increasingly in danger of falling victim to the bestial serial killer herself, she fights the traumas of the slums by her own means. The ultra-long showdown really packs a punch: if you don’t shudder, you’ll scream.