夺命心跳剧照

孔武健壮的约翰·布里克纳因杀人罪被判入狱，刑满释放后，他在工地和酒吧找到两份兼职，过着虽不富裕却很安定的生活。然而这样一个靠身体和拳头吃饭的男人注定拥有不平凡的人生。当年被他杀死的男人的妻子维洛妮卡找上门来，要求约翰给她的女儿治病。为了酬钱，约翰接受了黑市拳经纪人雷诺及其女友弗朗姬的邀请，走入了充满血腥和暴力的地下格斗场。在这个几乎没有任何法则的格斗世界里，约翰凭借一双铁拳打败无数强悍的对手，但这毕竟是一条充满艰险的道路……。Someone downloads an app on your phone behind your back. It looks like an augmented reality game, but soon you realize it's an app that connects to the world of the dead, which allows you to see the dead through the camera of the phone. On the screen you see a countdown timer starting from 24 hours and before it reaches zero, you have to download the app to someone else's phone...。