Follows a pair of siblings who love but distrust each other as they embark on a white-water rafting trip with a small group. One of their friends from childhood turns out to be more dangerous than he appears.。这部电影的灵感来自重量级拳击手查克·韦普纳的一生,他一生中只有一次与穆罕默德·阿里对决的经历。。