Coco, a 17-year-old who has lost her mother, has become withdrawn and unable to get along with her long-estranged divorced father. As an anti-black group, Uncle Blade neglects the way of communication and only takes strict control to make Coco more rebellious, drifting around nightclubs and sinking into the sea of poison. She knows Arrow, a justice figure rare in the underworld. Unfortunately, everyone in the world wants to break them up. They wanted to turn around but were chased by the new big man, Arrow was killed, Coco was gang raped. It's too late for the blade to know how to care for her daughter. Only with blood can she be taught to return to the right path.

17岁的Coco自丧母后性情变得孤僻，又不能与疏离已久的离异父亲相处，身为反黑组沙展的刀片叔忽略沟通之道，只适以严厉管束，使Coco更为反叛，流连夜店，沉沦毒海。她认识了一位在黑社会罕有的正义人物阿箭，可惜世上所有人都想拆散他们。他们想回头却被新扎大佬追杀，阿箭被杀，Coco惨遭轮奸。刀片懂得关怀爱女已太迟，唯有以鲜血教导她回归正路……