距离上一次风飞鲨攻击东岸已过了五年，幸存者芬恩一行人早已习惯协调安稳的生存。这回，芬恩偕同家人前往赌城拉斯维加斯展开家族旅游，岂料，一种斩新进化的风飞鲨逐步形成，再度掀开一场腥风血雨的天降鲨机！

Life can change in an instant, and turn your whole world upside down. And that is exactly what happens to firefighter Jeff Elliott and his wife Ruth who are living their dream in the golden Midwest; high school sweethear…

又是一年毕业季，金发美女桑迪·切宁（卡莉·许洛德 Carly Schroeder 饰）和英俊帅气的弟弟伊莱（科迪·林雷 Cody Linley 饰）学业无忧，前途光明。夜幕降临，姐弟二人和莱克丝（Jillian Murray 饰）、蕾拉（Chloe Bridge…