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.。身患重病即将不久于人世的单亲父亲霍尔姆,将自己的大女儿玛丽、小女儿夏洛特以及自己的好友艾德里安夫妻二人叫到自己的家里聚餐。。