喬納、米契、瑪莎、凱莉和吉伯特等人，前晚還在沙灘上與一群同伴狂歡通宵開趴，隔天被熾熱驕陽曬醒後，竟發現其他人憑空消失原本以為大夥天亮後提前回家，直到眾人一個接一個被沙灘上莫名的怪物逐漸吞噬後，他們才發現大難臨頭！...

After surviving an attempt on her life, a reclusive mystery author discovers that her nanny has stolen her identity, forcing her to go to extreme lengths to get her children back....