Sixteen years after Help!!!, Johnnie To is back within the confines of a hospital, this time to tell the story of a brain surgeon (Zhao Wei) who is reeling with guilt after committing two medical mistakes that cost one patient his mobility and another his consciousness. And things are not getting better, as a cop (Louis Koo) and his squad barge into her medical unit with a wounded criminal (Wallace Chung). There’s a bullet in his head but he’s still conscious and full of calculated sardonic playfulness. It soon appears that he was shot in the head while unarmed, during a violent interrogation where he was threatened and roughed up, until one the cops’ gun went off by accident. Thus the cop is walking on eggshells as he needs to both cover his squad and get information from the criminal in order to stop his accomplices, who are still on a robbery spree in Hong Kong. This puts him at odds with the brain surgeon, who is not ready to lose another patient, whether he be a ruthless gangster or not.
