女孩杰茜与女友吉姆在毕业晚会后,携弟弟马尔斯找男友洛根一起去一俱乐部狂欢。狂欢中吉姆拿着杰茜的手机突然失踪了,通过手机GPS定位,她们三人找到了变态囚禁狂爱德华家。糟糕的是,吉姆是爱德华的亲妹妹,她们落入了精心设计的圈套中……The night before their high school graduation, Jessie and her friends are guided by a 'Find My iPhone' app to recover her lost device from a house whose demented tenants are hell bent on making her a flesh and blood member of the family.