Alec Mercer是一位世界知名的行为科学家,他以其独特和出人意料的方式理解人类行为,为涉及政府、执法部门和企业的一系列高风险案件提供专业知识。。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.。